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State Regulations
How legal limits vary across the 48 contiguous states — and why it matters for your route.
Interstate Legal Height Limits
Most states set their legal height at 13'6″. States with higher limits are extruded upward — hover any state for details.
Why This Matters
Height is one of six dimensions our calculator checks for every state on your route. Width, length, weight, and overhangs all have their own state-by-state thresholds — and each one can independently trigger permits, escorts, and travel restrictions.
Height data sourced from current state DOT regulations for the Interstate (National Network). Individual state rules may differ on non-Interstate roads.