New Mexico Bridge and Route Restrictions for Trucks

Jan. 23, 2026, 7:23 p.m.
Trucking in New Mexico requires careful attention to bridge weight limits and designated routes, especially for oversize and overweight vehicles. The New Mexico Department of Transportation (NMDOT) enforces these rules to ensure road safety and infrastructure protection.
New Mexico Bridge and Route Restrictions for Trucks

 

1. Why Restrictions Exist

  • Protect Bridges: Overweight trucks can cause structural damage.

  • Maintain Road Safety: Certain roads are too narrow or curvy for large trucks.

  • Comply with Federal and State Law: NMDOT follows both federal guidelines and state-specific regulations.

2. Legal Weight Limits for Bridges

  • Gross Vehicle Weight (GVW) Maximum: Standard limit is 80,000 lbs on interstate highways unless a permit is obtained.

  • Axle Weight Limits: Vary by axle configuration; overweight trucks must get a special permit.

  • Bridge Formula: Used to determine safe weight based on number of axles and spacing.

Tip: Always check posted bridge weight limits before travel. Overweight trucks without a permit can face fines and detainment.

3. Route Restrictions for Trucks

  1. Designated Truck Routes:

    • Major highways like I‑25, I‑40, and US‑285 are primary truck routes.

    • Trucks are often restricted from residential streets, school zones, and narrow roads.

  2. Oversize/Overweight Routes:

    • Special permits specify approved routes to avoid bridges or roads that cannot handle heavy loads.

    • NMDOT maintains an online system to check approved routes before moving oversize loads.

  3. Seasonal Restrictions:

    • During spring thaw or extreme weather, certain roads may have temporary weight limits.

4. Obtaining Permits for Restricted Routes

  • Single-Trip Permits: For occasional oversize/overweight moves.

  • Annual Permits: For companies frequently transporting heavy loads.

  • Route-Specific Approvals: The permit will list exact roads and bridges allowed.

Application: Use the  Oversize/Overweight Permit system online. Include vehicle dimensions, weight, origin, and destination at  https://www.newmexicotruckingonline.com/

5. Safety Tips for Truckers

  • Always carry permit documentation for oversize/overweight moves.

  • Follow NMDOT route restrictions and posted signs.

  • Use escort/pilot vehicles if required by the permit.

  • Monitor weather conditions and seasonal road restrictions.

Key Takeaways

  • Bridge and route restrictions protect roads, bridges, and public safety.

  • Oversize or overweight vehicles require special permits and must follow designated routes.

  • Violating restrictions can lead to fines, vehicle impoundment, and liability for damages.

 

New Mexico Bridge and Route Restrictions for Trucks

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