St. Louis District

Construction I-44 Meramec River

Meramec River Bridges

Construction begins 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.

I-64 lane closures across PSB

All lanes are currently open in both directions on the Poplar Street Bridge in St. Louis City.  Crews will be working during off-peak hours to complete work on barrier, lighting, the flood walls, other preventative maintenance that couldn't be completed during the widening and painting the bridge.

Latest News

  • MoDOT to close Broadway ramp to westbound I-64 for two weeks


    ST. LOUISStarting next Monday, drivers heading west from downtown will need to avoid the ramp from Broadway to westbound I-64, as crews will close the ramp for two weeks to remove, repair and replace the driving surface.

    Crews will close the ramp...

  • St. Louis Work Zones for March 21-27


    ST. LOUISDrivers who use I-44 should be aware of some new lane restrictions that will be in place after this weekend.

    On Saturday, March 23, crews will close two lanes on westbound I-44 and shift the remaining two lanes onto the eastbound...

  • Work Zone 5K, 1 Mile Fun Run Saturday, April 13, in Chesterfield


    ST. LOUIS – Spring is here and soon construction and maintenance work zones will be popping up like daffodils across the region.

    Employees from MoDOT, St. Louis County, Missouri Highway Patrol, construction industry partners and their families will...

Other construction projects

Route 109 over Route 100

An upcoming project starting next spring on  Route 109 over Route 100  in Wildwood.

Safety Design Build project

Construction continues to improve safety at 31 locations in the greater St. Louis region

Current planning for I-270 North

Planning for improvements to the I-270 corridor is underway

Multimedia area

Photos & video


MoDOT Flickr
Flyover Construction for the Route 141 project

141 Ramp Work Video


Video on YouTube
Sliding the Poplar Street Bridge 9 feet downstream

Moving the PSB


Video on YouTube
Crews prepare to slide the PSB 9 feet south.

Sliding the PSB


Photos on Flickr