Release Date: June 4, 2021

CDOT to Close a Portion of Main Street in Downtown Longmont for Railroad Crossing Repairs

From Monday, June 14, through Friday, June 25, US Highway 287/Main Street in downtown Longmont is scheduled to be closed by the Colorado Department of Transportation (CDOT) between 1st Avenue and 2nd Avenue for repairs to the BNSF railroad crossing. Work will include: replacing the railroad ballast, ties, rails and the concrete surface crossing panels at the 1st Avenue and US Highway 287 crossing. The work also includes removing and replacing the concrete pavement along each side of the crossing along with the adjacent curb, gutter, and sidewalk sections. BNSF Railway will be performing the repairs, and the traffic control will be managed by CDOT. Access to local businesses will be maintained during the closure and the area will be clearly signed accordingly.

Below is an overview of the closure and expected detours: 

  • Dates of Closure: June 14 – June 25
  • Closure area: Highway 287/Main Street between 1st and 2nd Avenue
  • 24-hour closure 
  • Detour
    • Traffic traveling northbound on Main Street/Highway 287 will be detoured via Ken Pratt Boulevard to South Pratt Parkway and Martin Street. Traffic traveling northbound between Ken Pratt Boulevard and Boston Avenue will be detoured via Boston Avenue
    • Traffic traveling southbound on Main Street/Highway 287 will be detoured via 3rd Avenue to South Pratt Parkway and Martin Street
  • 1st Avenue will be reduced to one-way, eastbound only traffic between Main Street and Martin Street to facilitate construction on the 1st and Emery Street intersection improvement project

Please note that BNSF and CDOT may delay or reschedule this closure due to weather or other circumstances and an update regarding the closure will be issued in the event of a postponement. Questions regarding the project should be directed to CDOT at 970-350-2368.

Detour Map

Click here to download a PDF of the detour map

A map showing the downtown detour on Ken Pratt Boulevard, Martin Street, Boston Avenue and 3rd Avenue for the BNSF Railway Repairs June 14 - June 25