Design nears completion on Underpass Avenue – Billings Project; construction planned for 2022

Billings Area Highlights

The Montana Department of Transportation (MDT) would like to update the public on the status of the Underpass Avenue – Billings project, which will provide improvements to the Underpass Avenue/State Avenue and 6th Street West/Central Avenue intersections. The newly-designed project incorporates new traffic signals, storm drain, lighting, improved pedestrian facilities, and upgraded signing to enhance these intersections, promote accessibility and improve safety. After much review and public participation, the following improvements are planned to both fulfill traffic and pedestrian needs and community desires. Construction is tentatively scheduled for summer 2022.

Plans for the Underpass Avenue/State Avenue intersection improvements will include:

  • Dual southbound left turn lanes from 6th Street West for morning traffic
  • Additional lanes on Underpass Avenue
  • Additional pedestrian improvements
  • Relocated pump house and new storm drain inlets
  • New traffic signal and lighting
  • Lighting under the MRL bridge for pedestrians/bicyclists

Plans for the 6th Street West/Central Avenue intersection improvements will include:

  • Dual northbound left turn lanes from 6th Street West for evening traffic
  • New traffic signal and lighting
  • Additional pedestrian improvements

Other project improvements will include:

  • Detention ponds for stormwater
  • Full lane from Laurel Road westbound ramp to Moore Lane
  • Connection to recent City of Billings project at Calhoun Lane
  • Coordination with the South Side Neighborhood Task Force on a mural planned for the sidewalk in the underpass

For more information on the Underpass Avenue – Billings project please visit:

Comments, questions or concerns can be directed to Lisa Olmsted at or by calling (406) 869-6329.

Alternative accessible formats of this document will be provided on request. Persons who need an alternative format should contact the Office of Civil Rights, Department of Transportation, 2701 Prospect Avenue, PO Box 201001, Helena, MT 59620. Telephone 406-444-5416 or Montana Relay Service at 711.

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