St. Louis District

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 Work Zones for Nov. 14 - Nov. 20


    ST. LOUIS Weather in November in the St. Louis area can vary from day to day. Drivers are encouraged to be on the lookout for slow moving road operations which could range from plowing snow, picking up debris, or patching potholes. No matter the...

  • St. Louis Work Zones for Oct. 31 - Nov. 6


    ST. LOUIS - Drivers heading to Illinois across the Interstate 55/Interstate 64 Mississippi River Bridge (the Poplar Street Bridge) this weekend should consider alternate routes or expect delays as crews will close three left lanes on the eastbound...

Other construction projects

Riverview resurfacing project

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

Route 109 over Route 100

A current project widening a bridge and making roadway improvements at  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

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