| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Mankato,
                MN Blue Earth Co. United States | CR 12 (586th Ave.) / Hoffman Rd. (44.15578, -93.93909) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2018 | Year Completed estimated (2015-2019). | 
| Mankato,
                MN Blue Earth Co. United States | Hoffman Rd. / Prairie Winds Dr. (44.15592, -93.94483) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2018 | Year Completed estimated (2015-2019). | 
| Mankato,
                MN Nicollet Co. United States | Rockford Rd. (CR 41) / Pleasant View Dr. / 520th St. (44.18361, -94.06988) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.1960 | Other (At-Grade) Single-Lane | 2013 | Year Completed estimated (2011-2015). | 
| Mankato,
                MN Blue Earth Co. United States | Stadium Rd. / Pohl Rd. (44.14510, -93.97611) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2020 | Opened August 29, 2020. https://www.keyc.com/2020/08/28/mankatos-newest-roundabout-open-saturday/ | 
| Mankato,
                MN Blue Earth Co. United States | CR 12 / Adams St. (44.16990, -93.92685) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 54.8640 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2022 | Year Completed estimated (2021-2023). | 
| Mankato,
                MN Blue Earth Co. United States | STH 22 / Augusta Dr. (44.18859, -93.94948) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 51.8160 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2024 | https://www.keyc.com/video/2024/10/04/roundabout-highway-22-augusta-drive-mankato-opens-october-5/ | 
| Mankato,
                MN Blue Earth Co. United States | N Riverfront Dr. / US 14 WB Ramps (44.18921, -93.98149) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Freeway Ramps (Grade-Separated) Single-Lane | 2021 | Raindrop shaped. https://www.youtube.com/watch?v=umJ5m7CeN3k. | 
| Mankato,
                MN Blue Earth Co. United States | N Riverfront Dr. / US 14 EB Ramps (44.18788, -93.98280) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Freeway Ramps (Grade-Separated) Single-Lane | 2021 | Raindrop shaped. https://www.youtube.com/watch?v=umJ5m7CeN3k. | 
| Mankato Township,
                MN Blue Earth Co. United States | STH 83 / 586th Ave. (44.14513, -93.93894) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.6720 | Other (At-Grade) Single-Lane | 2017 | Merging right-turn bypass lanes on north and east legs. Year Completed estimated (2015-2018). | 
| Manly,
                New South Wales Northern Beaches Australia | Pittwater Rd. / Balgowlah Rd. (-33.78660, 151.28102) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Manly,
                Auckland Auckland New Zealand | Whangaparaoa Rd. / Beach Rd. / Rawhiti Rd. (-36.63111, 174.76389) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Manly,
                Queensland Brisbane Australia | Gordon Parade / Kingsley Terrace (-27.45013, 153.18171) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Manly West,
                Queensland Brisbane Australia | SR 30 (Preston Rd. - Manly Rd.) / Manly Rd. / Whites Rd. (-27.45931, 153.17652) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Manning,
                SC Clarendon Co. United States | Raccoon Rd. / W Huggins St. / Silver Rd. (33.68728, -80.24358) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 33.7883 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Manoora,
                Queensland Cairns Australia | Pease St. / Anderson St. (-16.91712, 145.74174) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Manor Park,
                England Halton United Kingdom | A558 (Daresbury Expressway) / Pitts Heath Ln. / Blackheath Ln. (53.34919, -2.65611) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Manor Park,
                England Halton United Kingdom | Manor Park Ave. / Windmill Hill Ave. N / A558 (Daresbury Expressway) WB On-Ramp (53.34421, -2.66997) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | ||
| Mansfield,
                GA Newton Co. United States | Mattie Ct. (33.58092, -83.69798) | Traffic Calming Circle Existing | Uncontrolled Unknown | 2 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Mansfield,
                OH Richland Co. United States | Middle Bellville Rd. / Straub Rd. (40.71063, -82.53678) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.3074 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Mansfield,
                OH Richland Co. United States | Mansfield-Lucas Rd. / Illinois Ave. / E Cook Rd. (40.73380, -82.48583) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | Opened August 11, 2022. https://www.richlandsource.com/business/community_development/roundabout-at-cook-illinois-mansfield-lucas-to-be-opened-thursday-at-10-a-m/article_1ff0124e-18e7-11ed-aa9f-0f857334eaa6.html | 
| Mansfield,
                TX Ellis Co. United States | Hadley Ln. / (church access) (32.52005, -97.08558) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2017 | Year Completed estimated (2017-2018). | 
| Mansfield,
                Victoria Mansfield Australia | B320 (Maroondah Hwy.) / C320 (High St.) / C518 (Midland Hwy.) / Highett St. (-37.05209, 146.08811) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Mansfield,
                Victoria Mansfield Australia | Highett St. / Malcolm St. (-37.05824, 146.08680) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Mansions at Canyon Creek,
                KS Johnson Co. United States | W 95th Ln. (38.95544, -94.88063) | Other Existing | Uncontrolled Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Mansions at Canyon Creek,
                KS Johnson Co. United States | W 95th Ln. / Zarda Dr. (38.95602, -94.87907) | Other Existing | Uncontrolled Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Manteca,
                CA San Joaquin Co. United States | E Louise Ave. / Felice Way / Ambrose Dr. (37.81205, -121.20128) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 50.2920 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2018 | |
| Manteca,
                CA San Joaquin Co. United States | Woodward Ave. / Al Fonseca Ln. (37.77564, -121.23833) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 2016 | |
| Manteca,
                CA San Joaquin Co. United States | Woodward Ave. / Oleander Ave. (37.77562, -121.24315) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 2019 | Year Completed estimated (2018-2019). | 
| Manteca,
                CA San Joaquin Co. United States | E Woodward Ave. / Shoreline Dr. / McKinley Ave. (37.77547, -121.27071) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2021 | No splitter island on north leg (rural). Year Completed estimated (2021-2022). | 
| Manteca,
                CA San Joaquin Co. United States | Galleria Dr. / Diablo View Dr. (37.77254, -121.26299) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2019 | Year Completed estimated (2018-2020). | 
| Manteo,
                NC Dare Co. United States | SR 1128 (Sir Walter Raleigh St.) / SR 1130 (Bideford St.) (35.90418, -75.67849) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 24.3840 | Other (At-Grade) Single-Lane | 2009 | Painted splitter islands. | 
| Mantua,
                OH Portage Co. United States | SR 82 / Chamberlain Rd. (41.30863, -81.28112) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | https://www.record-courier.com/story/news/2022/07/30/mantua-roundabout-finally-open-odot-says-improve-safety/10173568002/ | 
| Manunda,
                Queensland Cairns Australia | Anderson St. / James St. / Martyn St. / Severin St. (-16.91281, 145.75476) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Manvel,
                TX Brazoria Co. United States | Pomona Pkwy. / Kirby Dr. (29.52867, -95.40026) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 54.8640 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2015 | East leg shows two through movements even though no receiving leg. | 
| Manvers,
                England Rotherham United Kingdom | A6023 (Manvers Way) / Brookfields Way / Farfield Park (53.50611, -1.32716) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Manzhouli,
                Inner Mongolia Hulun Buir China | (unknown) (49.62575, 117.37220) | Unknown Existing | Unknown Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Maple Ash,
                AZ Maricopa Co. United States | W 9th St. / S Maple Ave. (33.42046, -111.94122) | Traffic Calming Circle Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Maple Ash,
                AZ Maricopa Co. United States | W 9th St. / S Ash Ave. (33.42048, -111.94237) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Maple Ash,
                AZ Maricopa Co. United States | W 11th St. / S Maple Ave. (33.41763, -111.94123) | Traffic Calming Circle Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Maple Ash,
                AZ Maricopa Co. United States | W 12th St. / S Maple Ave. (33.41619, -111.94121) | Traffic Calming Circle Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Maple Grove,
                MN Hennepin Co. United States | Territorial Rd. / Fernbrook Ln. N (45.14293, -93.46214) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0040 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2021 | Elliptical shaped. ICD = 105 ft x 100 ft. https://maplegrovevoice.com/f/project-update-fernbrook-lane-territorial-road-intersection | 
| Maple Grove,
                MN Hennepin Co. United States | 101st Ave. N / Lawndale Ln. (45.13832, -93.50388) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2023 | Year Completed estimated (2023-2024). | 
| Maple Grove,
                MN Hennepin Co. United States | 101st Ave. N / Troy Ln. N (45.13846, -93.51193) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2023 | Year Completed estimated (2022-2023). | 
| Maple Grove,
                MN Hennepin Co. United States | 80th Ave. N / Shadyview Ln. (45.09989, -93.50991) | Roundabout Existing | All-Way Yield None | 3 Approaches 3 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2005 | |
| Maple Grove,
                MN Hennepin Co. United States | Arbor Lakes Pkwy. N / Village Way (45.09695, -93.42891) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2017 | Year Completed estimated (2017-2018). | 
| Maple Grove,
                MN Hennepin Co. United States | Revere Ln. / Fountains Dr. (45.09193, -93.41215) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.1960 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2019 | South and east legs stubbed. Year Completed estimated (2018-2019). | 
| Maple Grove,
                MN Hennepin Co. United States | Zachary Ln. N / 101st Ave. N (45.13782, -93.42223) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 37.0693 | Other (At-Grade) Single-Lane | 2013 | Year Completed estimated (2012-2013). ICD estimated from Google Maps linework. | 
| Maple Grove,
                MN Hennepin Co. United States | Jonquil Ln. / 85th Ave. (45.10938, -93.43398) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 57.3175 | Other (At-Grade) Single-Lane | 2001 | Mountable splitter islands, driverways in circle, parking in circle, pedestrian amenity in central island. Functional Class: Local ICD estimated from Google Maps linework. | 
| Maple Grove,
                MN Hennepin Co. United States | Norwood Ln. / 85th Pl. (45.10971, -93.43961) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 44.6737 | Other (At-Grade) Single-Lane | 2006 | Intersection of local and collector street in residential development. Functional Class: Collector ICD estimated from Google Maps linework. | 
| Maple Lake,
                MN Wright Co. United States | Division St. / Elm Ave. / CR 8 (45.22951, -93.99437) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 25.2338 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2018 | http://www.minnesotatzd.org/events/conference/2019/documents/powerpoints/27_Stein.pdf -- https://maplelakemessenger.com/2018/07/work-begins-on-mini-roundabout/ ICD estimated from Google Maps linework. | 
| Maple Ridge,
                BC Greater Vancouver Canada | 232 St. / Fern Crescent (132 Ave.) (49.24206, -122.57960) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 32.0000 | Other (At-Grade) Single-Lane | 2009 | Year Completed estimated (2008-2009). | 
| Maple Ridge,
                BC Greater Vancouver Canada | 232 St. / 132 Ave. (49.24329, -122.57999) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 34.0000 | Other (At-Grade) Single-Lane | 2018 | |
| Maple Ridge,
                BC Greater Vancouver Canada | 113B Ave. / Golden Ears Way NB Ramps (49.20927, -122.66722) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 31.9904 | Freeway Ramps (Grade-Separated) Single-Lane | 2009 | Year Completed estimated (2008-2009). ICD estimated from Google Maps linework. | 
| Maple Ridge,
                BC Greater Vancouver Canada | Jackson Rd. / 102 Ave. (49.18779, -122.54119) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 26.5401 | Other (At-Grade) Single-Lane | 2012 | Year Completed estimated (2012-2013). ICD estimated from Google Maps linework. | 
| Maple Valley,
                WA King Co. United States | SE Tahoma Way / Maple Valley Black Diamond Rd. SE (47.35796, -122.02252) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.5079 | Other (At-Grade) Single-Lane | 2018 | East Entrance to Tahoma High School. Year Completed estimated (2018-2019). ICD estimated from Google Maps linework. | 
| Maple Valley,
                WA King Co. United States | Witte Rd. SE / SE 248th St. (47.37966, -122.04813) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2011 | January 2011. | 
| Maple Valley,
                WA King Co. United States | SE 240th Blvd. / 228th Ave. SE (47.38734, -122.03723) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2018 | Southwest leg stubbed. Year Completed estimated (2017-2018). | 
| Maple Valley,
                WA King Co. United States | 228th Ave. SE / SE 275th Pl. / SE Bear Blvd. (47.35485, -122.03766) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 2017 | Year Completed estimated (2016-2017). | 
| Maple Valley,
                WA King Co. United States | Witte Rd. SE / SE 254th Pl. (47.37383, -122.04867) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2024 | https://www.maplevalleywa.gov/departments-services/public-works/capital-improvement-projects/current-transportation-improvement-projects/t-28b-ph-3-south-witte-road-se-roundabout-improvements | 
| Mapleridge,
                FL Broward Co. United States | SW 35th Ave. / SW 36th Terrace / SW 51st Ct. (26.05849, -80.19219) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Mapleton,
                ON Wellington Canada | Wellington Road 8 / Wellington Road 12 (43.73042, -80.61149) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 35.3839 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| Maplewood,
                MN Ramsey Co. United States | Sheren Ave. E / Castle Ave. E / Van Dyke St. (45.00990, -93.02256) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 30.3974 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Maplewood,
                MN Ramsey Co. United States | Legacy Pkwy / (unknown) (45.03324, -93.03310) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 27.0089 | Other (At-Grade) Single-Lane | 2004 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Maplewood,
                MN Ramsey Co. United States | Frost Ave. / English St. (44.99927, -93.04572) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.5374 | Other (At-Grade) Single-Lane | 2002 | Completed October 2002. Twenty-year ADT is 15,000. ICD estimated from Google Maps linework. | 
| Maplewood,
                MN Ramsey Co. United States | Kennard St. / Legacy Pkwy. (45.03317, -93.03062) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.1373 | Other (At-Grade) Single-Lane | 2004 | Site has RT pavement arrows at entrance line. ICD estimated from Google Maps linework. | 
| Maplewood,
                NJ Essex Co. United States | Midland Blvd. / Highland Ave. (40.73043, -74.25748) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 83.2644 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Maplewood,
                NJ Essex Co. United States | Midland Blvd. / Norfolk Ave. (40.73111, -74.25972) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 16.2907 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Marana,
                AZ Pima Co. United States | Main St. / Civic Center Dr. (32.44841, -111.21150) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 34.2674 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Marana,
                AZ Pima Co. United States | N Sandario Rd. / W Nichols St. (32.45805, -111.21703) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.2715 | Other (At-Grade) Single-Lane | 2018 | Fourth leg incomplete. Future plans are to route Marana Main St to this roundabout. https://realestatedaily-news.com/wp-content/uploads/2017/02/Marana-Main-Street-realignment.png ICD estimated from Google Maps linework. | 
| Marana,
                AZ Pima Co. United States | N Sandario Rd. / W Twin Peaks Rd. (32.38076, -111.21671) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | https://www.maranaaz.gov/news/2022/5/25/traffic-alert-construction-on-a-new-roundabout-located-at-the-twin-peaks-and-sandario-road-intersection | 
| Marana,
                AZ Pima Co. United States | W Moore Rd. / N Tortolita Rd. (32.43912, -111.08270) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | https://www.maranaaz.gov/news/2022/5/25/traffic-alert-roundabout-construction-at-moore-road-amp-tortolita-road | 
| Marangaroo,
                Western Australia Wanneroo Australia | Rawlinson Dr. / Jefferson Dr. (-31.82872, 115.84922) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways | Other (At-Grade) Single-Lane | ||
| Marangaroo,
                Western Australia Wanneroo Australia | Mirrabooka Ave. / Rawlinson Dr. / (parking) (-31.82890, 115.85225) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Marangaroo,
                Western Australia Wanneroo Australia | Highclere Blvd. / Rawlinson Dr. (-31.82780, 115.84134) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways | Other (At-Grade) Single-Lane | ||
| Marblehill,
                GA Pickens Co. United States | Steve Tate Hwy / Cove Rd. (34.42716, -84.27606) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 40.3906 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Marco,
                FL Collier Co. United States | Cape Marco Dr. (25.91059, -81.72673) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Marcoola,
                Queensland Sunshine Coast Australia | SR 6 (David Low Way) / Rex Terrace (-26.60316, 153.09622) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Marcy,
                NY Oneida Co. United States | Marcy-SUNY IT Pkwy. / Edic Rd. (43.13954, -75.23764) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 44.4460 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2014 | ICD estimated from Google Maps linework. | 
| Mardi,
                New South Wales Central Coast Australia | B74 (Wyong Rd.) / Tonkiss St. / Woodbury Park Dr. (-33.30597, 151.40917) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Mareeba,
                Queensland Mareeba Australia | Rankin St. / Chewko Rd. / Hopkins Ave. (-16.99832, 145.41690) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Marengo,
                IL McHenry Co. United States | SR 23 / Harmony Rd. (42.18243, -88.61803) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Single-Lane | 2020 | Yield-controlled right-turn bypass lane on north leg. | 
| Marengo,
                IL McHenry Co. United States | SR 23 / I-90 WB Ramps (42.17930, -88.61798) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 45.7200 | Freeway Ramps (Grade-Separated) Single-Lane | 2020 | Yield-controlled right turn bypass lane on east leg off freeway exit ramp. Merging right turn bypass lane on south leg onto freeway entrance ramp. | 
| Marengo,
                IL McHenry Co. United States | SR 23 / I-90 EB Ramps (42.17539, -88.61798) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 45.7200 | Freeway Ramps (Grade-Separated) Single-Lane | 2020 | Yield-controlled right turn bypass lane on east leg off freeway exit ramp. Merging right turn bypass lane on south leg onto freeway entrance ramp. | 
| Marewa,
                Hawke’s Bay Napier New Zealand | Hawkes Bay Expy. (SH 2)  / Taradale Rd. (-39.51088, 176.87643) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Marewa,
                Hawke’s Bay Napier New Zealand | Hyderabad Rd. / Prebensen Dr. (-39.49504, 176.89353) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Marewa,
                Hawke’s Bay Napier New Zealand | Hyderabad Rd. / Taradale Rd. (-39.49529, 176.89553) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Margaret River,
                Western Australia Augusta-Margaret River Australia | SR 10 (Bussell Hwy.) / Wallcliffe Rd. / Forrest Rd. (-33.95366, 115.07353) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Margaret River,
                Western Australia Augusta-Margaret River Australia | SR 10 (Bussell Hwy.) / Boodjidup Rd. / John Archibald Dr. (-33.96099, 115.07672) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Margaret River,
                Western Australia Augusta-Margaret River Australia | SR 10 (Perimeter Rd.) / John Archibald Dr. (-33.96039, 115.10128) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | 2018 | |
| Margaret River,
                Western Australia Augusta-Margaret River Australia | Margaret River South Rotary [SR 10 (Perimeter Rd. - Bussell Hwy.) / Bussell Hwy.] (-33.98045, 115.08758) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Margate,
                Queensland Moreton Bay Australia | Duffield Rd. / Victoria Ave. (-27.24390, 153.09919) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Left-turn-only lanes on west and north legs. | |
| Margate,
                Queensland Moreton Bay Australia | MacDonnell Rd. / Victoria Ave. (-27.23649, 153.10056) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Left-turn-only lanes on all legs. | |
| Margate,
                Tasmania Kingborough Australia | B68 (Channel Hwy.) / Beach Rd. / Pin Oak Pl. (-43.02627, 147.26107) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Margate,
                Queensland Moreton Bay Australia | Duffield Rd. / Maine Rd. (-27.24281, 153.09154) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Margate,
                FL Broward Co. United States | Margate Blvd. / NW 58th Ave. (26.24263, -80.20480) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.2793 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Margina,
                Timiş Romania | E673-DN68A / A1 SB On-Ramp / DC106 (45.85815, 22.24196) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Freeway Ramps (Grade-Separated) Single-Lane | ||
| Margina,
                Timiş Romania | E673-DN68A / A1 NB Off-Ramp (45.85813, 22.24811) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Freeway Ramps (Grade-Separated) Single-Lane | ||
| Marian,
                Queensland Mackay Australia | Kennys Rd. / O'Riely Ave. (-21.15189, 148.95713) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Maribo,
                Zealand Denmark | Sekundærrute 153 (Rødbyvej - Brovejen) / Vestre Landevej / Rydsmarken / Vesterbrogade (54.77549, 11.48647) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Maribo,
                Zealand Denmark | Sekundærrute 153 (C.E. Christiansens Vej - Østre Landevej) / Østre Blvd. (54.77754, 11.51713) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane |