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 has started.

  • Highway users should expect minor delays during construction hours.
  • Ogallala Road closed at Hwy 119 to accommodate a detour. No traffic will be allowed to use Ogallala

Project Information

The goal of the SH119 - Airport Road Underpass project is 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, as currently planned will provide 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.


Construction of the Underpass will continue through December 2014.

Underpass Nearly Complete - Dec. 23, 2014


Boulder County Transportation
Tim Swope, AICP