Construction/Traffic Impacts

Dorsett

The first diverging diamond interchange in St. Louis opened to traffic Sunday, October 17, 2010.

Traffic exiting the interstate at Dorsett may turn right on red at the bottom of the ramps after stopping and yielding to oncoming traffic. Motorists need to anticipate traffic from the proper oncoming roadway. Drivers cannot turn left on red (notice the red arrows on the traffic signal indications). The right turn signals at the exit ramps have red ball indications, not red arrows. Only the lefts have red arrows. The rights can go right on red, the lefts cannot.

Page Avenue

The new interchange includes a dual lane ramp from northbound I-270 to westbound Page Avenue/Route 364 as well as a slip ramp for the Bennington Place exit on westbound Page Avenue/Route 364.

Marine Avenue

This work began in June 2011. During the bridge rehabilitation of the Marine Avenue bridge, occasional lane closures and lane shifts occurred. Impacts will occur in one direction, then the other direction on I-270. This work was completed in the fall of 2011.

Other related projects

To view the city of Maryland Heights' Progress Parkway relocation project, click here

To view the enhancements at the Dorsett interchange by the city of Maryland Heights, click here (2.83 MB, pdf)