US 36 Surface and Safety Improvements between Boulder and Lyons

About the Project:

This project will begin in May 2023 and is expected to conclude in approximately 17 weeks. Work will consist of surface and safety improvements along the US 36 corridor between Boulder and Lyons. Project working hours are subject to 7 a.m. to 7 p.m., with night work occurring from 9 p.m. to 5 a.m.

Project Benefits

  • US 36 is a commonly used bike corridor, but it also has a significant amount of accidents. This work will seek to address that safety need through widening corridors and road resurfacing.

Work Schedule:

  • Daytime work hours are 7 a.m. to 7 p.m. Monday through Friday. Night work will take place between 9 p.m. and 5 a.m., and feature mobile closures.

Traffic Impacts:

  • Motorists can expect various shoulder closures throughout the project’s duration, and right lane closures at Left Hand Canyon and Nelson Road. Both Northbound and Southbound traffic will be affected.

Refer to for real-time travel conditions and road closures

Work this Week & Lane Closures
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Project Facts

  • Construction Cost: $4.2 Million
  • Contractor: Martin Marietta
  • Timeline: May - August 2023
    85 working days to complete
  • Location: US 36
    • Nearest Town/City: Between Lyons and Boulder
    • Mile Point(s): MP 21.86 - 25.80; MP 26.90 - 27.12; MP 27.56 - 27.80
    • County: Boulder