Phoenix Metro Area Projects

Loop 101 Widening Project: Shea Boulevard to Loop 202

Other Projects

In addition to the general-purpose lane widening project, ADOT has other upcoming projects in the area of Loop 101 (Pima Freeway).

Black Mountain Boulevard

Black Mountain Boulevard (BMB) CMAR project is located in Maricopa County, within the city of Phoenix, at the traffic interchanges of State Route 51 and Loop 101. The proposed Phase II work consists of constructing two new roadway ramps connecting SR 51 to Black Mountain Boulevard and a pedestrian bridge and roundabout, south of Pinnacle High School.

Project Schedule

Phase II of construction began early June and is expected to be completed in spring 2016.

Phase I was completed in February 2015 and added a new segment of Black Mountain Boulevard (BMB) between Pinnacle Peak Road and Rough Rider Road and also made roadway improvements at Pinnacle High School.

Construction Activities
  • State Route 51 ramps/drainage/embankments/piers: early 2016
  • Pedestrian bridge and roundabout: early 2016
  • Project complete spring 2016
Project Alerts
  • None at this time

For additional project information, please visit the Black Mountain Boulevard project site or call 855.712.8530.


The modern roundabout is a type of raised intersection with no traffic lights. It is designed to reduce crashes and improve traffic flow. By understanding what a modern roundabout is and how it works, motorists, bicyclists and pedestrians can travel through intersections easier and more safely.

As you enter a roundabout, remember two key points:

  • Never merge. The right of way is observed at the yield sign. Motorists already in the roundabout have the right of way. You must slow down or stop to yield to traffic approaching from the left. Wait for a gap in traffic, then carefully proceed into the roundabout.
  • Go SLOW. Slow down to 15-25 mph when entering. Let vehicles already circulating go ahead. Obey all one-way signs. Watch for pedestrians, bicyclists, emergency vehicles and large vehicles.

Please visit our Roundabout page to view a simulation video.