Railroad Quiet Zones: Project Group 1 - City of Longmont
Orange Train crossing 9th Avenue in Longmont with a white SUV and Blue car waiting.

Project Group 1 for the railroad Quiet Zones project includes the four crossings listed below with the improvements. Construction is anticipated to start in May 2025 and is anticipated to be completed by the end of the year. It will include installation of asphalt pavement, concrete curb/gutter/sidewalk, raised medians, pavement markings, signage, fencing and installation of railroad gates with flashers.

 

Once construction of these crossing is completed, a request will be filed with the Federal Railroad Administration to implement the Quiet Zone. If approved, the Quiet Zone will go into effect. See the project FAQs for more information about Quiet Zones.

 

Current Status

Updated May 8, 2025.

  • Pre-construction tasks start Monday, May 12 at the 17th Ave. crossing. For one day only, traffic will be reduced to one lane in each direction on either side of the crossing. Traffic will return to two-lanes in each direction for approximately two weeks.
  • Primary construction at the 17th Ave. crossing will start after Memorial Day. Travelers should expect temporary lane closures and one-way traffic for approximately two months.
  • Construction at the 9th Ave. crossing will start in mid-June and continue through July. There will also be temporary lane closures and one-way traffic during this time.
  • Construction at the crossings for 3rd Ave./Atwood St. and Longs Peak Ave./Atwood St. will begin in July and continue through October. There will be temporary lane closures and a full crossing closure for a limited time at both crossings.
  • Detour signs will direct vehicle and pedestrian traffic to alternate routes, as needed.
  • Local access to driveways adjacent to the railroad crossings will be maintained at all times. There will be occasions when vehicles may only be able to enter and exit from one direction.
  • Regular construction hours are Monday – Friday from 7 am – 5 pm. Some work may occur until 7 pm and also on Saturdays, as necessary.

 

Proposed Improvements

  • 3rd Avenue/Atwood Street: Four-quadrant gate (quad gate) 
  • Longs Peak Avenue: Four-quadrant gate (quad gate) 
  • 9th Avenue: Two-quadrant gate with median 
  • 17th Avenue: Two-quadrant gate with median 

Schedule

  • Phase 1 (May – July 2025): 9th Avenue and 17th Avenue
  • Phase 2 (July – October 2025): Longs Peak Avenue and 3rd Avenue

Questions?

For questions or concerns about the Quiet Zones project, please email QuietZones@longmontcolorado.gov or call 720-526-2044. More information about all four of the project groups can be found by visiting the Railroad Quiet Zones in Longmont webpage.

 

search