logo map
            HOME PAGE               |        CONSTRUCTION / TRAFFIC IMPACTS         |               PROJECT NEWS                 |      CONTACT US
Dorsett diverging diamond interchange I-270 and Page interchange
I-270 bridge over Marine looking northbound


The I-270 and Dorsett Page Project has been selected as one of ten finalists for the 2012 America's Transportation Award.



ACEC Award MThe I-270 and Page Avenue/Route 364 interchange project received the 2012 Honor Award from the American Council of Engineering Companies (ACEC) of Missouri. The award was presented to URS Corporation.


Award The Marine Avenue bridge project was honored with the 2011 Award of Excellence in the Transportation category by the Great Plains chapter of the International Concrete Repair Institute (ICRI).


Roads and BridgesTThe I-270 and Dorsett interchange was named one of 2011's Top 10 bridges by Roads and Bridges Magazine.


Roads and Bridges Magazine    The I-270 and Page Avenue/Route 364 interchange was named one of 2011's Top 10 Roads by Roads and Bridges Magazine


The I-270 and Dorsett/Page Project was awarded the 2011 Missouri Waste Control Coalition's Outstanding Achievement Award in the Environmental Innovation category. For more information, click here.


The St. Louis chapter of Women in Transportation awarded it's 2010 Innovative Transportation Solutions for the Dorsett diverging diamond interchange.


Dorsett Traffic Cameras

To view the Dorsett DDI cameras, go to www.gatewayguide.com, choose I-270 from the drop down route menu under the camera picture, and choose either I-270 n/o Dorsett, or Dorsett Road at Progress Parkway.


Quick facts about the projects

Dorsett Diverging Diamond fact sheet  (2 pages, 160 kb)


St. Louis' first diverging diamond interchange (DDI) opened to traffic on Sunday, October 17, 2010.

Since the opening, MoDOT has noticed the success of the DDI in easing congestion and handling the traffic flow.

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; it is illegal in Missouri.


The interchange was converted to a DDI in October 2010, and the project was completed by the summer of 2011.


Page flyover ramp. Learn more>>

Construction on the new northbound I-270 ramp to westbound Page Avenue (Route 364) began in early 2010. The project was completed by the fall of 2011.


I-270 Auxiliary Lane Construction. Learn more>>


Marine Avenue bridge. Learn more>>


A Green Project. Learn more>>


Other related projects


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








Home Page     |   Construction/Traffic Impacts      |   Project News     |   Contact Us