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 prepares for winter storm forecasted for Friday


    St. Louis – Throughout the St. Louis region today, motorists may notice crews treating the roads with salt brine in preparation for the forecasted winter snowstorm moving into the region tomorrow afternoon.

    National Weather Service is predicting...

  • St. Louis Work Zones for February 14-20


    ST LOUIS – February in St. Louis can bring everything from ice to 50 degree weather. Drivers are encouraged to be on the lookout for slow moving road operations which could range from plowing snow to patching potholes. No matter the type of slow...

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