Wyoming Oversize & Overweight Permits

When Wyoming needs a permit

Wyoming permits over 8'6" wide, 14' high, or 80,000 lb, and you clear through a Port of Entry (call at least an hour ahead). Escorts start at 14' wide on two-lane roads and 15' on the Interstate. Everything runs daylight only, a half hour either side of the sun. Six holidays are hard blackouts. Overweight fees are a base plus per-ton-per-mile, and oversize-plus-overweight pays the greater fee, not both.

Thresholds, escorts, and curfews

• Legal max before a permit: Permit needed over 8'6" wide, 14' high, or 80,000 lb, and past legal length. Wyoming's axle/bridge-formula table lets some rigs gross above 80,000 (tandem 36,000 lb) before the overweight line, so confirm the configuration.
• Escort / pilot car: On two-lane roads one escort at 14' wide or 110' long, and generally two escorts for the widest loads. On the Interstate and divided highways one escort at 15' wide; a rear overhang over 25' adds one. Pole cars and police escort come in on the largest loads. Confirm on the permit.
• Superload: Past the routine permit band (about 18' wide, 17' high, 110' long, or single 25,000 / tandem 55,000 / tridem 65,000 lb axles and 160,000 lb gross), Wyoming treats the move as a superload needing route and structural review before it issues.
• Travel curfew: Daylight only, defined as a half hour before sunrise to a half hour after sunset. Loads under 10' wide can run nights on the Interstate with proper lighting. Six holiday blackouts (New Year's, Memorial Day, July 4, Labor Day, Thanksgiving, Christmas) run from a half hour after sunset the eve until a half hour before sunrise the day after.
• Permit fee: Single-trip permits start around $15; an overweight permit adds a base fee plus a per-ton, per-mile charge on the weight over 80,000 lb. A load that is both oversize and overweight pays the greater of the two fees, not the sum. Annual and 90-day permits are available.

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