SH119 - Airport Road Underpass Project Before Photo 

Highway 119 - Airport Road Pedestrian Underpass and Sidewalk

Traffic Impacts

Construction of the Highway 119 Underpass at Airport Road is COMPLETE!

Project Information

The goal of the SH119 - Airport Road Underpass project was to increase safety for cyclists and pedestrians trying to access Airport Road and those trying to access the Longmont-to-Boulder trail from west Longmont.

The project provides several facility enhancements including:

  • New lighted pedestrian and bicycle underpass under northbound Highway 119; Sketch of Airport & SH 119 Underpass
  • Enhanced at-grade crossing of southbound Highway 119;
  • New eight-foot concrete sidewalk along Airport Road from Highway 119 to the City of Longmont border (and tie-in to the City sidewalk system).


The attached design shows the underpass and sidewalk connection. Questions or comments can be directed to the address below.

Underpass Nearly Complete - Dec. 23, 2014


Boulder County Transportation
Tim Swope, AICP