Low clearance bridges on Montana interstates and US highways
2 spots where an interstate or US highway in Montana has less than 16 ft of clearance. The lowest is 14 ft 8 in on US-12, Missoula. 2 are under 15 ft.
Posted signs and your permit come first. These are the clearances Montana reported to the federal National Bridge Inventory in 2025. Repaving, snow and new work can lower them.