St. Louis District

I-270 North Open House Virtual Public Meeting

Construction I-44 Meramec River

Meramec River Bridges

Construction continues on the I-44 Meramec River Bridge project just west of I-270

Study St. Charles County Missouri Route N Wentzville Lake St. Louis

Route N (St. Charles County) Study

MoDOT, along with FHWA, is conducting a National Environmental Policy Act (NEPA) Study on Route N from west of South Point Prairie Road east to the I-64/Route 364 interchange.

Road conditions Weather Flooding Real-time Congestion

Roadway conditions

Get your real-time roadway conditions around St. Louis at Gateway Guide

I-44 construction in St. Louis City

MoDOT is replacing or renovating several bridges in St. Louis City along I-44. See more about those projects, or others along I-44 here.

Latest News



    ST. LOUIS – The Missouri Department of Transportation is moving into the construction phase of the I-270 North Design-Build Project. On April 20, 2020, the eastbound I-270 off ramp to Washington Street/Elizabeth Avenue will close. This closure will...

  • St. Louis Work Zones for April 2 - 8


    ST. LOUIS – Motorists should be aware of an Interstate 44 ramp closure lasting one month starting Monday, April 6. As part of on-going construction on the I-44 bridge over Jefferson, crews will close the ramp from eastbound I-44 to Jefferson for 30...

Other construction projects

I-270 NORTH Project

The I-270 North Project is the next step toward improvements along interstate 270 from I-70 to just west of the Riverview interchange.

Riverview resurfacing project

See the latest information on the Riverview (Route H) resurfacing project.

Route 340 resurfacing

An upcoming project to resurface the portion of Route 340 (Olive Boulevard and Clarkson Road) between Lea Oak and I-270, which includes several sidewalk and signal improvements.

Multimedia area

Photos & video


MoDOT Flickr
Concrete for the Meramec River Bridge foundations

Meramec Bridge


Photos on Flickr
Sliding the Poplar Street Bridge 9 feet downstream

Moving the PSB


Video on YouTube
Construction on Route 109 near Wildwood

Work on Route 109


Photos on Flickr