A: The I-270 North Project is the next step toward improvements along interstate 270 from I-70 on the west to the Chain of Rocks Bridge on the east. This follows the completed I-270 North Environmental Assessment (EA) that addressed impacts of congestion, safety, and mobility, as well as accessibility and aging infrastructure, along I-270. The Federal Highway Administration (FHWA) determined that the Preferred Alternative for the I-270 North EA will have no significant impact on the area. This means the Missouri Department of Transportation (MoDOT) can now move to the next step - upgrading I-270.
The project is needed because of the current issues on I-270, including unsafe conditions, deteriorating infrastructure, and traffic congestion.
- Safety: I-270 North has a higher crash rate than comparable roads in the St. Louis region. Some crashes can be attributed to traffic congestion. This project will improve mobility on the corridor and help reduce crashes related to traffic congestion. The project will also reconstruct the corridor and bring it up to modern design standards to improve safety as opposed to the standards that were in place in the 1960s and 1970s when I-270 was constructed.
- Deteriorating Infrastructure: I-270 is showing its age. Bridges and pavement are breaking down from many years of heavy freight volumes. Traffic signals, signs, drainage structures, and lighting are all deteriorating. The existing infrastructure is breaking down and resulting in emergency maintenance repairs. This project will replace deteriorated infrastructure and ultimately will result in fewer work zones along I-270 for decades to come.
- Traffic Congestion: I-270 North is one of the heaviest travelled roads in Missouri. On average over 140,000 vehicles travel the corridor each day (Average Daily Traffic). I-270 North was constructed when traffic volumes were much lower. This project will improve mobility on the mainline, at the interchanges, and on the outer roads. The redesign and reconstruction of I-270 North will reduce traffic congestion faced by local users and interstate travelers.
The I-270 North Project is being conducted by the Missouri Department of Transportation (MoDOT). MoDOT has retained a consulting team to assist with preliminary engineering, procurement and public involvement and outreach efforts.
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.
Improving the entire I-270 North corridor is estimated to cost $700 million. Currently there is $225 million available for construction.
The current strategy is to complete sections of the corridor as funds become available. There are six to eight individual projects throughout the corridor. Unless additional funding is obtained before construction begins, the project is anticipated to take 17 years to complete.
The public can obtain information about the project through any of the following methods:
- Sign-up for updates
- Attend an open house or community presentation
- Contact Justin Wolf, Project Manager, Missouri Department of Transportation St. Louis District at Justin.Wolf@modot.mo.gov
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