Economic Benefits of Transportation,  Missouri,  Reduced Congestion

I-270 North Design-Build Project

Missouri Department of Transportation is improving reliability and addressing safety with the $278 million Interstate 270 North Project in St. Louis County. The project – MoDOT’s largest of the past decade – runs along I-270 from I-70 on the west to just west of Riverview Drive.

The I-270 North Design-Build Project seeks to improve reliability within the I-270 corridor, link communities, and enhance traffic operations so that the public has a durable and maintainable transportation network.

Challenges within the corridor include safety. Reports show that both directions of I-270 have higher than average rates of severe crashes. They also indicate higher-than-average crash rates, with eastbound I-270 showing an average crash rate 30% higher than the statewide average for interstates.

Other challenges include the corridor’s position as one of the heaviest traveled interstates in Missouri; 140,000 vehicles, of which 18 percent are heavy trucks, travel it daily. In addition, the corridor offers limited pedestrian facilities.

The project will reconstruct eight interchanges, add an additional lane of pavement on I-270 from Lindbergh Blvd. to Route 367, improve accessibility for bicycles and pedestrians, and improve safety with an updated outer road system that includes outer road conversions and removal of cross over slip ramps.

“Seeing this project come to fruition is great progress for the community, the region, and the entire state of Missouri,” said MoDOT Director Patrick McKenna. “The I-270 North Project is MoDOT’s largest single project in the last decade. It will replace aging infrastructure, enhance safety and resiliency of the system and improve mobility for freight and passengers, all while creating an economic boost for nearby communities. MoDOT’s design-build model to scale the scope of work to match existing resources has worked well for us, and I believe it will with this project, too.” Work is scheduled to be completed by Dec. 1, 2023.

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