Project Summary

The project consists of various intersection improvements along Missouri Route 100 in Washington, MO from St Johns Rd. to Route AT.   The issues along Route 100 include high traffic volumes at intersections; short or no turning lanes; motorists traveling at high speeds; and high crash rates at intersections with 43% of all crashes being rear-end crashes.

Currently this project is unfunded.  A study was completed in July 2022 along the corridor to determine various alternatives at each of the intersections.

Alternatives for improvements may include:

  • Roundabouts
  •  J-Turns
  •  Traffic Signals
  •  Add or extend
       - Acceleration/Deceleration Lanes
       - Turning Lanes

The improvements will assist with:

  • Improving traffic flow by providing alternatives that provide for continuous movement.
  • Reducing conflict points when compared to conventional intersections.
  • Reducing crashes when comparing to existing conditions.
Counties Impacted
Project Status
Planning Phase
Route Impacted
Missouri Route 100

Project Milestones

Traffic Study
July 2022
Public Information Meeting
Dec. 1, 2022
4-6 p.m.
Washington City Hall Council Chambers, 405 Jefferson St., Washington, MO 63090

There will not be a formal presentation. Individuals can attend the open-house style meeting at any time during the above hours to speak with MoDOT engineers and designers on the results of the study.

Click HERE to SHARE YOUR THOUGHTS on the project.


Contact Photo
Alvin's Portrait
Alvin Nieves-Rosario, P.E.
Transportation Project Manager
Contact Info

St. Louis District
Office: (314) 453-1839


Contact Photo
Stephen O'Connor Profile Picture
Stephen O'Connor
Area Engineer, Franklin and Jefferson Counties
St. Louis District
Contact Info

Office: (314) 453-5021