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

Crews have two left lanes closed on the westbound I-64 (Poplar Street Bridge) bridge across the Mississippi.  These lanes remain closed around-the-clock until early October, with the two right lanes closing after that and remaining closed around the clock through October.

Latest News

  • St. Louis Work Zones for December 6 - 12


     ST. LOUISDrivers in the north St. Louis County area need to be aware of several nights of work on ramps at the I-270 and I-70 and the I-270 and Route 180 (St. Charles Rock Road) interchanges into next week.

    Crews will close the westbound I-70...

  • MoDOT to close ramp to PSB, three lanes on PSB this weekend


    ST. LOUIS Drivers heading into Illinois from I-55 will need to consider alternate routes this weekend, as crews will have the ramp from eastbound I-44/northbound I-55 closed to eastbound I-64 across the Mississippi River on the Poplar Street Bridge...

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