Counties Impacted
Jefferson
Route Impacted
21
Completed

Project Timeline

Complete
Public hearing
February 1, 2018 (please note as of November 2018 the improvements at Lowry Lane have been postponed - updated maps will be available soon).
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Complete
Right of way property acquisition

Fall 2018

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Complete
Contract award

Spring 2019

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Not Started
Construction begins

Late spring 2019

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Complete
Construction complete

Late 2019

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What is being done on Route 21?

A southbound left turn lane will be added on Route 21 at two locations. This will be done by widening existing Route 21 and replacing the existing shoulders. All entrances along the widened area will be reconstructed and the road will be resurfaced and restriped. In addition, guardrail will be added on southbound Route 21 at Hilltop/MacKenzie Ridge.  Originally this project included work at Lowry Lane but work at that location has been postponed.  Please note the documents still reference the work at Lowry Lane but will be updated when new maps become available.

Click here to view a map of the locations included in this project.

Why is this work being done?

The addition of a left turn lane is expected to improve safety and reduce the number of crashes, as well as help overall traffic flow on Route 21.

How will traffic be impacted during construction?

Traffic will be shifted several times during construction which will allow one lane of Route 21 to remain open at all times. Flaggers will be on hand to direct traffic when there is only one lane open. The majority of work will be done during off-peak times.

How much will the project cost?

The project is expected to cost $1.9 million.

Project contact

Contact Photo
Stephen O'Connor Profile Picture
Stephen O'Connor, P.E.
Title
Area Engineer
Department
St. Louis District
Contact Info

Area Engineer, Franklin & Jefferson County Area 

(314) 453-5021



Stephen.OConnor@modot.mo.gov