| 
                City, 
                State County Country  | 
            
                Intersection (Lat, Lng)  | 
            
                Type Status  | 
            Control Type / Other Control Type | Approaches / Driveways / ICD (m) | 
                Functional Class /  LaneType  | 
            Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| 
                Columbus,
                MS Lowndes Co. United States  | 
            
                Military Rd. / US 82 WB Ramps (33.51915, -88.41193)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            2020 | https://cdispatch.com/news/2020-11-19/military-road-roundabout-project-to-reach-completion-by-end-of-november/ | 
| 
                Laurel,
                MS Jones Co. United States  | 
            
                Sawmill Rd. / Sixth Ave. / Central Ave. (31.69357, -89.13285)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x2 max)  |   
            2022 | Central Ave is one-way exiting roundabout. http://laurelmainstreet.com/tag/roundabout/ | 
| 
                Southaven,
                MS De Soto Co. United States  | 
            
                Bending Cherry Ln. / S Cherry Cove / S Cherry Dr. (34.90660, -89.94100)  | 
            
                Other Existing  | 
            
                Uncontrolled Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Olive Branch,
                MS De Soto Co. United States  | 
            
                Joe Lyon Blvd. / Lorrie Ln. (34.98979, -89.81802)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Biloxi,
                MS Harrison Co. United States  | 
            
                Division St. / Forrest Ave. (30.40358, -88.90335)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 57.9120  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2020 | https://www.wlox.com/2020/12/10/keeslers-division-street-gate-could-be-open-early-winter/ | 
| 
                Hattiesburg,
                MS Forrest Co. United States  | 
            
                Old Hwy 49 (Bay St. / James St.) / Hall Ave. / Arledge St. (31.31737, -89.28621)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                5 Approaches 0 Driveways 42.6720  | 
            
                Other (At-Grade) Single-Lane  |   
            2024 | https://www.wdam.com/2024/11/28/hall-ave-east-overpass-roundabout-open/ | 
| 
                Senatobia,
                MS Tate Co. United States  | 
            
                US 51 / W Main St. (34.61802, -89.96854)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2025 | https://mdot.ms.gov/portal/news_release_view/2186 | 
| 
                Ocean Springs,
                MS Jackson Co. United States  | 
            
                Ocean Springs Rd. / Groveland Rd. / Gulf Island National Seashore Rd. (30.41371, -88.77918)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2024 | https://www.oceanspringsweeklyrecord.com/local_news/and-around-we-go-os-road-roundabout-open-to-traffic-in-time-for-the-holidays/article_6f02eea2-bfe7-11ef-a11a-47671c82f774.html | 
| 
                Hernando,
                MS De Soto Co. United States  | 
            
                US 51 / W Oak Grove Rd. (34.81591, -89.99366)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2024 | https://www.youtube.com/watch?v=DyREbRKFmQQ | 
| 
                Lake Cormorant,
                MS De Soto Co. United States  | 
            
                SR 301 / Star Landing Rd. (34.90410, -90.10037)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Single-Lane  |   
            2023 | https://mdot.ms.gov/portal/news_release_view/1575 | 
| 
                Hattiesburg,
                MS Forrest Co. United States  | 
            
                Hardy St. / 2nd Ave. / Green St. / Adeline St. (31.32467, -89.29718)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                5 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.wdam.com/video/2022/10/20/hattiesburg-residents-circle-learning-curve-with-new-roundabout/ | 
| 
                Clinton,
                MS Hinds Co. United States  | 
            
                Bruenburg Pkwy. / Cowles Creek Rd. / Bellemeade Trace (32.33733, -90.35144)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Laurel,
                MS Jones Co. United States  | 
            
                Central Ave. / N 5th Ave. (31.69251, -89.13109)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2021 | Converted from traffic circle with all-way stop control by adding small raised splitter islands and converting to yield on entry. Year Completed estimated (2019-2022). | 
| 
                Gulfport,
                MS Harrison Co. United States  | 
            
                20th Ave. / Jones Park Dr. (30.36646, -89.08605)  | 
            
                Other Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            Pedestrian access to central island. | |
| 
                Biloxi,
                MS Harrison Co. United States  | 
            
                Ellzey Dr. / Medical Park Dr. (30.44652, -88.94459)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 33.5280  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | Circulatory roadway dotted edge line across exits. Year Completed estimated (2017-2019). | 
| 
                Oxford,
                MS Lafayette Co. United States  | 
            
                SR 30 / SR 7 SB Ramps (34.38488, -89.49810)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max)  |   
            2022 | Raindrop shaped. Series of three roundabouts. | 
| 
                Oxford,
                MS Lafayette Co. United States  | 
            
                SR 30 / Park Dr. (34.38524, -89.49947)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2022 | Series of three roundabouts. | 
| 
                Oxford,
                MS Lafayette Co. United States  | 
            
                SR 30 / Ferndale Blvd. (34.38595, -89.50223)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2022 | Series of three roundabouts. | 
| 
                Holly Springs,
                MS Marshall Co. United States  | 
            
                SR 4 (Holly Springs Bypass - E Eddie Lee Smith Dr.) / SR 7 (34.79574, -89.44691)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | |
| 
                Slayden,
                MS Benton Co. United States  | 
            
                US 72 / SR 7 (34.94637, -89.29731)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2023 | https://www.bidnetdirect.com/mississippi/solicitations/open-bids/statewide/Construction-of-a-Roundabout-on-US-72-at-SR-7/22676924418 | 
| 
                Senatobia,
                MS Tate Co. United States  | 
            
                West St. / Thompson St. (34.62211, -89.97041)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 35.0520  | 
            
                Other (At-Grade) Single-Lane  |   
            2010 | Year Completed estimated (2007-2010). | 
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                Baxter Ln. / Collonwood Rd. / Harper Puckett Rd. (45.70022, -111.10372)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Pedestrian Hybrid Beacon (PHB, HAWK)  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2024 | Year Completed estimated (2023-2024). https://www.kbzk.com/news/local-news/baxter-lane-ready-to-reopen-for-traffic-this-week-after-months-of-construction. | 
| 
                Armington,
                MT Cascade Co. United States  | 
            
                US 87-SR 200 / US 89 / (parking) (47.34909, -110.89673)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | Year Completed estimated (2022-2023). https://www.youtube.com/watch?v=7jSH18jbyKc | 
| 
                Missoula,
                MT Missoula Co. United States  | 
            
                Southgate Mall Access Rd. / Mary Ave. (46.84412, -114.02685)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 24.3840  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | Year Completed estimated (2016-2019). | 
| 
                Missoula,
                MT Missoula Co. United States  | 
            
                Mary Ave. / Southgate Mall Access Rd. (46.84420, -114.03158)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 30.4800  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | Year Completed estimated (2016-2019). | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                King Ave. W / S 56th St. W (45.75516, -108.65895)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.yourbigsky.com/local-news-2/billings-king-ave-56th-st-w-reopened/ | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Five Mile Rd. / Mary St. / (Billings Bypass) (45.84863, -108.42492)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 54.8640  | 
            
                Other (At-Grade) Single-Lane  |   
            2021 | https://www.yourbigsky.com/local-news-2/billings-bypass-project-roundabout-opening-on-november-24/ | 
| 
                Missoula,
                MT Missoula Co. United States  | 
            
                Mullan Rd. / Mary Jane Blvd. (46.88725, -114.05372)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 1 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2023 | Year Completed estimated (2022-2023). | 
| 
                Kalispell,
                MT Flathead Co. United States  | 
            
                US 2 / Springcreek Rd. / Dern Rd. (48.19696, -114.37378)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 42.6720  | 
            
                Other (At-Grade) Single-Lane  |   
            2021 | https://www.mdt.mt.gov/pubinvolve/dernspring/ | 
| 
                Missoula,
                MT Missoula Co. United States  | 
            
                Mullan Rd. / George Elmer Dr. (46.88749, -114.06835)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Rectangular Rapid Flashing Beacon (RRFB)  | 
            
                3 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2023 | |
| 
                Helena,
                MT Lewis and Clark Co. United States  | 
            
                SR 279 (Lincoln Rd. E) / I-15 NB Ramps (46.70444, -112.01118)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 32.0040  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            2022 | Raindrop shaped. Right-turn-only lane on south leg. Year Completed estimated (2021-2024). | 
| 
                Fairview,
                MT Richland Co. United States  | 
            
                SR 200 / SR 201 (47.86229, -104.04312)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2024 | https://www.roundupweb.com/story/2024/11/06/news/construction-substantially-complete-on-fairview-west-project/21482.html | 
| 
                Poplar,
                MT Roosevelt Co. United States  | 
            
                US 2 / 5th Ave. E (48.11438, -105.18443)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | https://www.roundupweb.com/story/2019/12/04/news/us-2-poplar-construction-winds-down/13182.html | 
| 
                Billings,
                MT Yellowstone County United States  | 
            
                Rimrock Rd. / 62nd St. W (45.79864, -108.67362)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 39.6240  | 
            
                Other (At-Grade) Single-Lane  |   
            2024 | https://www.facebook.com/trailnetbillings/photos/top-the-roundabout-at-rimrock-and-62nd-street-west-above-heading-east-on-rimrock/1087984726704259/?_rdr | 
| 
                Missoula,
                MT Missoula Co. United States  | 
            
                Philips St. / Scott St. (46.88097, -114.00629)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-lane w/ Traversable Central Island  |   
            2025 | https://www.montanarightnow.com/missoula/missoulas-northside-welcomes-new-roundabout-to-improve-traffic-flow/article_59cee533-bf05-4397-8548-c6041d41f4f9.html | 
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                S 11th Ave. / Arnold St. (45.65298, -111.05215)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 36.5760  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | |
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                W Oak St. / Cottonwood Rd. (45.69298, -111.10367)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Pedestrian Hybrid Beacon (PHB, HAWK)  | 
            
                4 Approaches 0 Driveways 56.3880  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2020 | Right-turn-only lanes on north and south legs, designed for future conversion to through lanes to make the roundabout 2x2. | 
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                S 11th Ave. / W Graf St. (45.64966, -111.05320)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 36.5760  | 
            
                Other (At-Grade) Single-Lane  |   
            2017 | |
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                W Graf St. / S 3rd Ave. (45.64930, -111.04692)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 35.0520  | 
            
                Other (At-Grade) Single-Lane  |   
            2020 | |
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                W Graf St. / S 17th Ave. (45.64943, -111.06043)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 36.5760  | 
            
                Other (At-Grade) Single-Lane  |   
            2017 | |
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                Cattail St. / Max Ave. (45.70770, -111.06912)  | 
            
                Roundabout Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            2021 | |
| 
                Poplar,
                MT Roosevelt Co. United States  | 
            
                US 2 / 13th Ave. E (48.11433, -105.17243)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | https://www.roundupweb.com/story/2019/12/04/news/us-2-poplar-construction-winds-down/13182.html | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Central Ave. / 56th St. W (45.76970, -108.65917)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.mdt.mt.gov/pubinvolve/56thRoundabouts/ | 
| 
                Helena,
                MT Lewis and Clark Co. United States  | 
            
                Lincoln Rd. / N Montana Ave. (46.70444, -112.02096)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.ktvh.com/news/lincoln-road-roundabout-opens-to-drivers | 
| 
                West End,
                MT Yellowstone Co. United States  | 
            
                Central Ave. / S 38th St. W (45.76969, -108.61240)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Pedestrian Hybrid Beacon (PHB, HAWK)  | 
            
                4 Approaches 0 Driveways 47.2440  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2019 | |
| 
                West End,
                MT Yellowstone Co. United States  | 
            
                Central Ave. / S 36th St. W (45.76949, -108.60726)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Pedestrian Hybrid Beacon (PHB, HAWK)  | 
            
                4 Approaches 0 Driveways 47.2440  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2019 | |
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                Catron St. / Max Ave. (45.71218, -111.06908)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 24.3840  | 
            
                Other (At-Grade) Single-lane w/ Traversable Central Island  |   
            2021 | |
| 
                Helena,
                MT Lewis and Clark Co. United States  | 
            
                N Washington St. / Frontage Dr. (46.62005, -112.00546)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                2 Approaches 0 Driveways 50.2920  | 
            
                Other (At-Grade) Single-Lane  |   
            2010 | Year Completed estimated (2009-2011). | 
| 
                Lame Deer,
                MT Rosebud Co. United States  | 
            
                US 212 / Cheyenne Ave. (45.62346, -106.66642)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | https://www.youtube.com/watch?v=lFiVq3W5VE8&list=PLxseor6I1x1FeOZIuVw6kIHif9ZNvw2DC&index=1 | 
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                Cottonwood Rd. / Stucky Rd. (45.65655, -111.10392)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 33.3914  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | ICD estimated from Google Maps linework. | 
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                W Oak St. / Davis Ln. (45.69299, -111.08300)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 34.2039  | 
            
                Other (At-Grade) Single-Lane  |   
            2017 | ICD estimated from Google Maps linework. | 
| 
                Sidney,
                MT Richland Co. United States  | 
            
                SR 16 (S Central Ave.) / SR 200 / SR 23 (47.68440, -104.17889)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | |
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                MT Hwy 3 / Zimmerman Trl. (45.80647, -108.59981)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 44.1250  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | ICD estimated from Google Maps linework. | 
| 
                Kalispell,
                MT Flathead Co. United States  | 
            
                Glacier Airport Rd. / (unknown) (48.30613, -114.24914)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 1 Driveways 30.1875  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2012 | ICD estimated from Google Maps linework. | 
| 
                Kalispell,
                MT Flathead Co. United States  | 
            
                Hutton Ranch Rd. / (unknown) (48.23358, -114.32399)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 42.1635  | 
            
                Other (At-Grade) Single-Lane  |   
            2012 | ICD estimated from Google Maps linework. | 
| 
                Kalispell,
                MT Flathead Co. United States  | 
            
                US 93 Alt / Foys Lake Rd. (48.18677, -114.33352)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 54.9422  | 
            
                Other (At-Grade) Single-Lane  |   
            2010 | ICD estimated from Google Maps linework. | 
| 
                Kalispell,
                MT Flathead Co. United States  | 
            
                US 93 Alt / Airport Rd. (48.16325, -114.30946)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 50.9843  | 
            
                Other (At-Grade) Single-Lane  |   
            2010 | ICD estimated from Google Maps linework. | 
| 
                Kalispell,
                MT Flathead Co. United States  | 
            
                US 93 Alt / (unknown) (48.15526, -114.29332)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 54.9760  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2010 | Two approaches stubbed for future use. ICD estimated from Google Maps linework. | 
| 
                Missoula,
                MT Missoula Co. United States  | 
            
                England Blvd. / Connery Way (46.89409, -114.04588)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 33.4619  | 
            
                Other (At-Grade) Single-Lane  |   
            2006 | ICD estimated from Google Maps linework. | 
| 
                Florence,
                MT Ravalli Co. United States  | 
            
                MT 203 (Eastside Hwy) / Eight Mile Creek Rd. (Lower Woodchuck Rd.) (46.63235, -114.04188)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 38.5456  | 
            
                Other (At-Grade) Single-Lane  |   
            2014 | Through bypass lane on northwest leg; add-type right-turn bypass lane on northeast leg. ICD estimated from Google Maps linework. | 
| 
                Belgrade,
                MT Gallatin Co. United States  | 
            
                Airway Blvd. / Gallatin Field Rd. (45.77350, -111.16244)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 39.1529  | 
            
                Other (At-Grade) Single-Lane  |   
            2015 | Right-turn bypass lane on southeast leg. Year Completed estimated (2013-2019). ICD estimated from Google Maps linework. | 
| 
                Belgrade,
                MT Gallatin Co. United States  | 
            
                Airway Blvd. / E Northern Pacific Ave. (45.76585, -111.16289)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 56.6545  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2015 | ICD estimated from Google Maps linework. | 
| 
                Belgrade,
                MT Gallatin Co. United States  | 
            
                Airway Blvd. / I-90 WB Ramps (45.76100, -111.16234)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 51.6601  | 
            
                Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)  |   
            2015 | Raindrop shape. ICD estimated from Google Maps linework. | 
| 
                Belgrade,
                MT Gallatin Co. United States  | 
            
                Airway Blvd. / I-90 EB Ramps (45.75980, -111.16328)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 42.4955  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            2015 | Raindrop shape. ICD estimated from Google Maps linework. | 
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                Catron St. / Blackbird Dr. (45.71193, -111.07903)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 20.8490  | 
            
                Other (At-Grade) Single-Lane  |   
            2004 | ICD estimated from Google Maps linework. | 
| 
                Bozeman,
                MT Yellowstone Co. United States  | 
            
                Bench Blvd. / Hilltop Rd. / Yellowstone River Rd. (45.81289, -108.46580)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 34.1305  | 
            
                Other (At-Grade) Single-Lane  |   
            2013 | Right-turn-only lane on south leg. ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Grand Ave. / 36th St. W (45.78403, -108.60541)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 50.8058  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2018 | Year Completed estimated (2015-2019). ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Henry Chapple St. / St Vincent Way (45.75948, -108.61935)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 36.6630  | 
            
                Other (At-Grade) Single-Lane  |   
            2013 | One approach stubbed out. ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                St Mary Way / Marillac St. / Henry Chapple St. (45.75672, -108.62191)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 39.9980  | 
            
                Other (At-Grade) Single-Lane  |   
            2013 | One approach stubbed out. ICD estimated from Google Maps linework. | 
| 
                Red Lodge,
                MT Carbon Co. United States  | 
            
                US 212 (Broadway Ave.) / 3rd St. (45.19487, -109.24681)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 40.3987  | 
            
                Other (At-Grade) Single-Lane  |   
            2015 | ICD estimated from Google Maps linework. | 
| 
                Lower Rattlesnake,
                MT Missoula Co. United States  | 
            
                N Van Buren St. / I-90 WB Ramps (46.87078, -113.98082)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 36.7424  | 
            
                Freeway Ramps (Grade-Separated) Unknown  |   
            2018 | Completed summer 2018. ICD estimated from Google Maps linework. | 
| 
                Butte,
                MT Silver Bow Co. United States  | 
            
                SR 276 / I-15-I-90 WB Ramps / Browns Gulch Rd. (46.00749, -112.61093)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                5 Approaches 0 Driveways 72.9993  | 
            
                Freeway Ramps (Grade-Separated) Unknown  |   
            2019 | https://mtstandard.com/news/local/rocker-roundabout-open-sort-of-completion-set-for-september/article_0b906772-e4f1-50d6-a293-abfa138fe9d2.html ICD estimated from Google Maps linework. | 
| 
                Helena,
                MT Lewis and Clark Co. United States  | 
            
                York Rd. / Lake Helena Dr. (46.64646, -111.89396)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 37.7156  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | https://www.abcfoxmontana.com/helena/york-roundabout-set-to-open-thursday/video_c15b781a-cf0e-11e9-b73b-efb751f4ffc8.html ICD estimated from Google Maps linework. | 
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                N 15th Ave. / Beall St. / Ruth Thibeault Way (45.68213, -111.05694)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 14.1849  | 
            
                Other (At-Grade) Single-lane w/ Traversable Central Island  |   
            2019 | https://www.ktvq.com/news/montana-news/roundabout-what-roundabout-some-bozeman-drivers-ignoring-roundabout-near-school ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Grand Ave. / 38th St. W (45.78400, -108.61111)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 44.9757  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2017 | Fourth leg stubbed. ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Hwy 3 / 27th St. / Airport Rd. (45.80209, -108.53540)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 45.7937  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2009 | Located at Billings airport. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| 
                East Helena,
                MT Lewis and Clark Co. United States  | 
            
                Canyon Ferry Rd. / Lake Helena Dr. (46.61710, -111.89391)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Single-Lane  |   
            2009 | |
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Shiloh Rd. / Grand Ave. (45.78407, -108.61760)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 39.1455  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2009 | Series of 8 roundabouts. Fatal crash 2012. 11861-05. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Shiloh Rd. / Broadwater Ave. (45.77685, -108.61760)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 44.9815  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2009 | Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Shiloh Rd. / Central Ave. (45.76963, -108.61760)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 53.3183  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2010 | Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Shiloh Rd. / Monad Rd. (45.76236, -108.61760)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 46.6596  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2010 | Series of 8 roundabouts. Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Shiloh Rd. / King Ave. (45.75507, -108.61760)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 58.3321  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2010 | Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Shiloh Rd. / (Local Access) (45.74776, -108.61750)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 37.5041  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2010 | Series of 8 roundabouts. Main access to construction materials facility (600+ trucks per day). Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Shiloh Rd. / Hesper Rd. (45.74060, -108.61740)  | 
            
                Roundabout Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 43.3436  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2009 | Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Shiloh Rd. / Zoo Dr. (45.73609, -108.61740)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 41.6799  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2009 | Series of 8 roundabouts. Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                King Ave. / Olympic Blvd. (45.75507, -108.61360)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 39.1658  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2008 | Near Kohl's retail shopping center. Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Shiloh Crossing Blvd. / Olympic Blvd. (45.75216, -108.61570)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 34.1677  | 
            
                Other (At-Grade) Single-Lane  |   
            2009 | Functional Class: Local ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                King Ave. / St. Vincent Way (45.75520, -108.62260)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 39.9990  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2009 | Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                Baxter Ln. / Ferguson Ave. (45.70024, -111.09310)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 32.0040  | 
            
                Other (At-Grade) Single-Lane  |   
            2003 | |
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                Laurel Pkwy. / Annie St. (45.68916, -111.11383)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 39.6240  | 
            
                Other (At-Grade) Single-Lane  |   
            2003 | |
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                Laurel Pkwy. / Glenellen Dr. / Sherwood Way (45.69050, -111.11401)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 38.1000  | 
            
                Other (At-Grade) Single-Lane  |   
            2003 | |
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                Cascade St. / Kimball Ave. (45.68162, -111.09510)  | 
            
                Traffic Calming Circle Existing  | 
            
                Unknown Unknown  | 
            
                0 Approaches 0 Driveways 19.1915  | 
            
                Other (At-Grade) Single-Lane  |   
            2004 | ICD estimated from Google Maps linework. | 
| 
                Bozeman,
                MT Gallatin Co. United States  | 
            
                Cascade St. / Clifden Dr. (45.68115, -111.09950)  | 
            
                Traffic Calming Circle Existing  | 
            
                Unknown Unknown  | 
            
                0 Approaches 0 Driveways 19.1916  | 
            
                Other (At-Grade) Single-Lane  |   
            2004 | ICD estimated from Google Maps linework. | 
| 
                Kalispell,
                MT Flathead Co. United States  | 
            
                (shopping center entrance) / (parking lot) (48.23521, -114.33170)  | 
            
                Other Existing  | 
            
                Uncontrolled Unknown  | 
            
                0 Approaches 0 Driveways 41.1480  | 
            
                Other (At-Grade) Single-Lane  |   
            2005 | |
| 
                Montana City,
                MT Lewis and Clark Co. United States  | 
            
                SR 282 / Jackson Creek Rd. (46.54082, -111.94824)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 44.1960  | 
            
                Other (At-Grade) Single-Lane  |   
            2007 | Opened October 2007. | 
| 
                Helena,
                MT Lewis and Clark Co. United States  | 
            
                Saddle Dr. / Colonial Dr. (46.57319, -111.97703)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 36.1246  | 
            
                Other (At-Grade) Single-Lane  |   
            2007 | ICD estimated from Google Maps linework. | 
| 
                Missoula,
                MT Missoula Co. United States  | 
            
                Union Pacific St. / O'Leary St. / Clark Fork Ln. (46.88880, -114.04560)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 36.5760  | 
            
                Other (At-Grade) Single-Lane  |   
            2003 | |
| 
                Missoula,
                MT Missoula Co. United States  | 
            
                Airway Blvd. / Expressway (46.91994, -114.07140)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 40.7875  | 
            
                Other (At-Grade) Single-Lane  |   
            2011 | Four-lane approach roadways that drop right lane into right-turn bypass lanes on all approaches. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Ironwood Dr. / Woodcreek Dr. (45.81641, -108.67716)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 39.6240  | 
            
                Other (At-Grade) Single-Lane  |   
            2003 | |
| 
                Kalispell,
                MT Flathead Co. United States  | 
            
                Stillwater Rd. / West Reserve Dr. (48.24038, -114.35220)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 37.3853  | 
            
                Other (At-Grade) Single-Lane  |   
            2007 | First roundabout by Montana DOT. ICD estimated from Google Maps linework. |