Michigan's split only applies where the posted limit is above 65. A separate provision drops heavy vehicles to 35 while reduced loadings are enforced.
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Michigan's split only applies where the posted limit is above 65. A separate provision drops heavy vehicles to 35 while reduced loadings are enforced.
After Idaho equalised in 2026, seven states keep a split speed limit on at least some roads. Five are western; two are not.
Montana has the highest car speed limit of any split-limit state, which makes its ten mile per hour truck differential the most visible in daily driving.
California holds trucks to 55 on every highway in the state, including freeways posted at 70 for cars. No other state has a gap that large.
A 2026 amendment equalised Idaho's truck and car speed limits. Most published comparison tables still list Idaho as a split-limit state.