Districts Impacted

Northwest
Counties Impacted
Clinton
Route Impacted
69
116
Work Type
Roundabout Construction
Completed

Project Summary

Why is MoDOT undertaking this project?

Between 2011 and 2018, there were three crashes which resulted in four fatalities at the intersection of U.S. Route 69 and Route 116 in Clinton County. Enhancements such as advanced signing were added during those years, but another crash on Jan. 21, 2019 resulted in another fatality. 

Following the January 2019 crash, the intersection was reevaluated and further enhancements were made. These included additional rumble strips and adding shoulder barricades with stop-ahead warnings. At that time, safety funding was designated for improvements to this intersection as part of the Statewide Transportation Improvement Program (STIP).

After additional study, a roundabout was selected for this interchange. According to the Insurance Institute for Highway Safety, a roundabout can reduce fatal and incapacitating collisions by 89 percent. Some of the features of a roundabout versus a typical intersection that contribute to this reduction are: reduced traffic speeds, smaller collision angles, and fewer conflict points. A typical intersection may have 20 to 30 conflict points, whereas a roundabout only has eight.

The project, just east of Interstate 35 near Lathrop,  is currently set to be constructed in a single construction season in 2022. Three of the four legs of the intersection will remain open throughout much of the construction, but with reduced speeds and turning restrictions. See more details below, including a video on navigating through a roundabout.

 

On this page you can:

Project Progress

Complete
Design, Right of Way Acquisition and Public Input Phase

This webpage serves as an online public portal by which input may be received on the planned project. Please review the materials on the page and use the comment form at the bottom to submit any questions, concerns and/or support for the project.

 

At this time, MoDOT will need to acquire right of way to complete the project. Staff from MoDOT's Right of Way department will be reaching out to property owners to inform them of any need for permanent acquisition, permanent easements and/or temporary easements for properties adjacent to the intersection.

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Complete
Online Public Meeting and Live Call-In Sessions

Due to COVID-19 precautions, no in-person public meetings were held for this project. An open-comment period was held Feb. 3 - 19. A live call-in session was held at two different times on Feb. 16, and comments were accepted by phone, mail and via this website through Feb. 19.

 

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Project Bidding and Award

The project was part of the August 2021 letting when contractors were able to submit competitive bids on the project.

The Missouri Highways and Transportation Commission considered all bids and awarded the project at their September 2021 meeting to Amino Brothers Co. Inc.

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Contractor May Begin Work

The project currently has an Oct. 4, 2021 Notice to Proceed date in the contract. This is the earliest date a contractor may begin work, unless they request an early Notice to Proceed.

For this project, however, the contractor will not begin work until spring 2022, as construction cannot be sustained through the winter months. We project a start date, with a closure of U.S. Route 69 to the south of the intersection, during or after March 2022.

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Construction Phases

The project will be conducted in three phases:

  1. Bypass construction - completed e)

  2. Roundabout construction - through Sept. 16, 2022

  3. South leg construction and bypass removal - through Sept. 2022

It is estimated that construction will take approximately 135 calendar days to complete all three phases of the project.

See more details about each phase details.

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Project Completion

The contractor has one construction season to complete the project, by contract, and all work must be finished by Nov. 1, 2022.

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Plans for phase 1 of construction of project J1S3341, intersection improvements in Clinton County at the intersection of Route 116 and US Route 69

Phase 1

Bypass construction
  • COMPLETED
  • A single-lane bypass for Route 116 traffic will be constructed on the south side of the intersection.
  • During Phase 1:
    • Route 116 and U.S. Route 69 north of Route 116 will be open to two-way traffic, though lane shifts may be necessary.
    • U.S. Route 69 south of Route 116 will be closed just north of 251st Street.
      • 251st Street will remain open
Phase 1 Plans
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Plans for phase 2 of construction of project J1S3341, intersection improvements in Clinton County at the intersection of Route 116 and US Route 69

Phase 2

Phase 2 - Roundabout construction
  • Expected completion: by Friday, Sept. 16
  • The roundabout, including truck aprons and islands, will be constructed north of the bypass
  • During Phase 2:
    • Route 116 traffic will be moved to the single-lane bypass with signals at either end to regulate the flow of traffic.
      • Traffic on Route 116 will not be permitted to turn either direction onto U.S. Route 69.
      • A 16-foot width restriction will be in place
    • Both directions of U.S. Route 69 will be closed, with no access to Route 116
      • U.S. Route 69 north of Route 116 will be closed just south of 256th Street. 
        • 256th Street will remain open
      • U.S. Route 69 south of Route 116 will remain closed just north of 251st Street.
        • 251st Street will remain open
Phase 2 Plans
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Plans for phase 3 of construction of project J1S3341, intersection improvements in Clinton County at the intersection of Route 116 and US Route 69

Phase 3

Phase 3 - South leg construction
  • Currently underway. Reopening of U.S. Route 69 is expected in late September. 
  • The south leg of U.S. Route 69, south of the roundabout, will be constructed.
  • During Phase 3:
    • Route 116 and U.S. Route 69 north of Route 116 will be open to two-way traffic.
      • Some shoulder closures may be necessary.
    • U.S. Route 69 south of Route 116 will remain closed north of 251st Street
      • 251st Street will remain open
Phase 3 Plans

All About Roundabouts

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Summary

Click the video to learn why a roundabout is safer than a traditional intersection, the features of a roundabout, and how to navigate through one.

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Project News

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Frequently Asked Questions

Yes and no.

Route 116 will remain open for the duration of the project, though it will be reduced to a single lane (with traffic signals and a width restriction) during Phase 2.

U.S. Route 69 north of Route 116 will be open in Phases 1 and 3, but closed in Phase 2, just south of 256th Street. (256th Street will remain open).

U.S Route 69 south of Route 116 will be closed for all three phases just north of 251st Street (251st Street will remain open).

Yes. MoDOT has contacted property owners adjacent to the intersection regarding permanent acquisitions, permanent easements and temporary easements.

Questions about the project may left by calling 888 ASK MODOT (1-888-275-6636).

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