Orbit I-115 speed limit in Montana
65 mphUsual limit · 35 to 65 mph along the way
Mostly 65 mph: about 74% of I-115 in Montana is posted at 65. Limits run from 35 to 65 mph along the way.
How much of I-115 is at each limit
Questions
What is the speed limit on I-115 in Montana?
Mostly 65 mph: about 74% of I-115 in Montana is posted at 65. Limits run from 35 to 65 mph along the way.
What is the highest speed limit on I-115 in Montana?
65 mph, on 74% of its length in Montana.
Can the limit be lower than this?
Yes. Work zones, bad weather and local signs can set a lower limit. The posted sign is always the limit.
How does Orbit know the limit?
Orbit uses state and federal road data and OpenStreetMap, and drivers confirm limits from the road. In the app, the limit for the road you are on shows on the map and in CarPlay.
Posted limits as of October 2026, from state and federal road data and © OpenStreetMap contributors, measured by length of road. Work zones, weather and signs can set a lower limit; always follow the posted sign.
Other Interstates in Montana
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