US 36 Surface & Safety Improvements between Boulder & Lyons

Project Completed

About the Project:

This project will begin in May 2023 and is expected to conclude in early October approximately. Project working hours are subject to 7 a.m. to 7 p.m., with 24-hour closures at Left Hand Canyon Road.

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.

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

Major Work Outstanding:

The following work is still being completed:

  • Sign Installation throughout entire project limits

Project Facts

  • Construction Cost: $4.2 Million
  • Contractor: Martin Marietta
  • Timeline: May - November 2023
  • Location: US 36
    • Nearest Town/City: Between Lyons and Boulder
    • Mile Point(s):  MP 19.80 - 25.80; MP 21.86 - 25.80; MP 26.90 - 27.12; MP 27.56 - 27.80
    • County: Boulder