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Route 100 Widening Project (West of Route 47)        


Route 100 at Route A

This stretch of Route 100 can no longer handle the amount of daily traffic resulting in longer delays.

Why are Improvements Needed on Route 100 between Route 47 and High Street?

This section of Route 100 in Washington has exceeded its capacity for a two-lane roadway and can no longer handle the amount of traffic that uses it on a daily basis. The Route 100 and Route A intersection has long traffic delays. The proposed widening and corridor improvements will provide better access to businesses and residential areas, provide increased safety, allow for a more efficient movement of traffic and encourage future economic development along Route 100. 

What Improvements Will MoDOT Accomplish?

  • Widen Route 100 to four lanes with a center turn lane from Route 47 to High Street.
  • Add dual left turn lanes onto Route 100 from Route A and from Jefferson Street.
  • Provide ADA (Americans with Disabilities Act) compliant pedestrian accommodations at
    signalized intersections where pedestrian activity is evident.

Aerial View of the Project Area

How Will Traffic Be Impacted?
Construction will occur on the north side of the existing roadway. Traffic will remain in its current location until the widening of the highway is mostly completed. There will be various lane closures during construction where motorists can expect delays.

When Will Construction Begin?
Construction began in Spring 2013 and will be completed by Spring 2014. The estimated right of way and construction cost is $7.7 million, and is a cost-share project with the City of Washington.


Route 100 at Route A

Improvements to the intersection of Route 100 at Route A will be the highlight of this widening project.

Who Do I Contact For More Information?



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