What It Means
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Single movement: It authorizes one specific trip only — typically one direction — rather than repeated use.
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Temporary validity: According to state regulations, a single-trip special permit is valid for up to five days, giving you a short window to complete the move.
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One-way only: It usually covers a one-way journey from a starting point to a destination on a specified route approved by the authority.
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Oversized/overweight vehicles: These permits are typically needed when a vehicle, self-propelled unit, or load exceeds the legal size or weight limits set by New Mexico law.
Purpose
The permit ensures that specialized or heavy equipment (such as large construction machines, cranes, farm equipment, oilfield units, etc.) that cannot be legally operated under normal size/weight limits can still travel on public roads once, under controlled conditions. It helps the state monitor and regulate the movement to protect infrastructure (like bridges and highways) and maintain safety.
Requirements & Conditions
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Route designation: The permit may outline the specific route you must follow.
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Fees: There are fees associated with single-trip oversize/overweight permits (often starting around a base fee with additional charges based on excess weight and mileage, per state statute).
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Inspection and compliance: The permit must be carried in the vehicle during the trip and is subject to inspection by enforcement officers.
Who It Applies To
A “self-propelled” vehicle means a vehicle that moves under its own power (not just towed equipment) and would otherwise exceed legal limits — for example:
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Large machinery used in construction or oilfield operations
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Oversized agricultural or industrial vehicles
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Specialized service rigs
These vehicles need the special permit when operating on public highways in New Mexico beyond the standard limits.
What Is A Single Trip Self-Propelled Permit In New Mexico?