Billings Infrastructure by the Numbers: Six Phases, 1.5 Miles and $1.5 Million in Funding

The Billings Bypass is a six-phase arterial roadway project led by the Montana Department of Transportation. As of 2026 three phases are complete and open: Five Mile Road, the Yellowstone River Bridge and the Railroad Overpass.

These figures sit against the backdrop of the I-90 Yellowstone River Project, finished in 2024 to improve safety and traffic flow on the interstate. The timing places renewed attention on remaining local work because the earlier interstate upgrade has already shifted traffic patterns through southeast Billings.

Named segments still ahead include the Johnson Lane Interchange, where construction is listed to begin in late 2026 and finish between 2027 and 2028. A separate 1.5-mile resurfacing project on 1st Avenue South, also known as Highway N-114A, is listed for southeast Billings and carries a tentative 2027 start date that depends on final design and funding.

Roadway Projects by the Numbers

The Montana Department of Transportation has identified the full Billings Bypass as six distinct phases. Three of those phases have reached completion, leaving three more in the pipeline. The Johnson Lane Interchange carries the clearest near-term schedule, with work slated to open the interchange between 2027 and 2028. The 1.5-mile resurfacing on 1st Avenue South stands as the shortest listed segment but requires additional steps before crews can begin.

These road figures come directly from project summaries issued by the Montana Department of Transportation and appear on agency planning documents dated through early 2026.

Water and Airport Investments

Construction on the new West End Water Treatment Plant started in 2025. The facility will include two reservoirs supplied by the Billings Bench Water Association Canal. At the airport, Billings Logan International Airport received $1,500,000 in federal funding to enlarge stormwater Pond E and manage runoff from new commercial aeronautical developments.

The $1.5 million allocation and the 2025 start date for the water plant are the only dollar and calendar figures attached to those two projects in current records. No further cost totals or completion dates for the water plant appear in the available project lists.

Next steps hinge on the listed timelines. Johnson Lane Interchange work is expected to move forward in late 2026, while the 1.5-mile resurfacing on 1st Avenue South remains subject to design and funding approvals before any 2027 construction can begin.