MoDOT is committed to meaningful stakeholder involvement and creating cost-effective transportation solutions that meet the community's needs. Reconstructing I-270 North will be challenging from a construction phasing and maintenance of traffic standpoint. It is vital that the traveling public and the communities along I-270 North be involved and informed during development and implementation. MoDOT will keep residents, travelers, and businesses up-to-date on construction impacts and alternate routes for travel during the project.

Throughout this project, beginning with the Corridor study, MoDOT has and will continue to dedicate considerable efforts to engage all stakeholders throughout the corridor including residents, business owners, community officials, industry experts, and workforce diversity partners. MoDOT created Community Advisory and Technical Advisory groups early in the process to garner community input. Additional efforts to engage the public include public engagement meetings, information campaigns, small group meetings, and other endeavors. An open house public meeting with all of the project details will take place on March 12, 2020.

The I-270 North Environmental Assessment (EA) completed in October 2012, addressed impacts of safety and congestion, as well as accessibility and aging infrastructure along I-270N.

I-270 North Corridor Study

Prior to the I-270 North Environmental Assessment, the Missouri Department of Transportation conducted an 18-month high-level feasibility study called the I-270 North Corridor Study. It studied the area between James S. McDonnell Boulevard and Bellefontaine Road. The feasibility study identified several problems (or concerns) along the corridor:

  • Limited capacity on I-270
  • Congestion; closely-space interchanges
  • Poor access for metro transit users, bicyclists and pedestrians
  • Confusing two-way cross-over slip ramps to Dunn Road
  • Aging infrastructure

At the end of the feasibility study, MoDOT wrote a final report highlighting the needs, problems and opportunities along the I-270 North Corridor between James McDonnell Boulevard and Route 367. This study was the first step in the project development process and lead to the Environmental Assessment.

I-270 North Environmental Assessment

Following the I-270 North Corridor Study, MoDOT conducted an Environmental Assessment (EA) along the I-270 North Corridor. The EA details the Preferred Alternative for improving the corridor and the study process.

The I-270 North Environmental Assessment (EA) addressed impacts of congestion, safety, and mobility, as well as accessibility and aging infrastructure along the interstate from I-70 on the west to the Chain of Rocks Bridge on the east. The study area was approximately 15 miles in length with 16 interchanges and included the municipalities of: Bridgeton; Hazelwood; Florissant; Calverton Park; Ferguson; Dellwood; and Bellefontaine Neighbors. Download the study area map.

The Missouri Department of Transportation (MoDOT) and the Federal Highway Administration (FHWA) approved the EA for I-270 from I-70 on the west to the Chain of Rocks Bridge and issued a Finding of No Significant Impact (FONSI) for this project; which opened the corridor for MoDOT to go out to start the Design Build process.

View the reports and conceptual drawings developed during the studies, and learn more.