RouteAllNew Mexico Oversize Load Requirements: Permits, Escorts
Last verified October 14, 2026 against the New Mexico rules linked below.
A New Mexico load needs a special permit once it is wider than 8 feet 6 inches, taller than 14 feet, or past the length and weight limits. The New Mexico Department of Transportation (NMDOT) issues permits online through NM-OPS for $25 a trip, valid 5 days.
On This Page
New Mexico gives a longer travel day than its neighbors and certifies the escort vehicle each year; the escort driver must be 18 and meet the home state's escort-driver licensing rules. This page covers both.
What are New Mexico's legal size limits?
New Mexico allows 8 feet 6 inches wide and 14 feet high without a permit. A combination may be 65 feet, and a semitrailer 57 feet 6 inches on interstates. A permit is needed past 3 feet of front overhang or 7 feet of rear overhang, even at legal length.
The table lists each limit with its statute or rule.
| Dimension | Legal limit | Source |
|---|---|---|
| Width | 8 feet 6 inches | NMSA 66-7-402 |
| Height | 14 feet | 66-7-404; 18.19.8.36 |
| Length | 65-foot combination; 57-foot-6-inch semitrailer on interstates; 40-foot single vehicle | 66-7-404 |
| Overhang | 3 feet front, 7 feet rear | 18.19.8.39 |
| Weight | 21,600 pounds single axle; gross by bridge table, up to 86,400 pounds | 66-7-409, 410 |
How do you get a New Mexico oversize permit?
Apply online through NM-OPS, the New Mexico Operating Permit System; NMDOT does oversize permits online only. The office answers at (505) 476-2475. A single-trip permit costs $25 and is valid 5 days, one way. You must have it before entering the state.
| Permit | Fee | Source |
|---|---|---|
| Single trip | $25, plus 2.5 cents a mile per 2,000 pounds over 86,400 | 66-7-413(D) |
| Annual | $250 | 66-7-413(C) |
| Multiple trip | Up to a year within four contiguous counties; 14 feet wide maximum | 18.19.8.51 |
RouteAll reads the permit you upload and drives the route it names. In New Mexico, using one road not on the permit can void it, so the route on the screen matters.
When does New Mexico require a pilot car?
New Mexico requires an escort once the load is 14 feet wide, and may require one below that on roads marked on the NMDOT escort map. Over 110 feet 1 inch long, one escort; over 120 feet 1 inch, two. Over 16 feet high, an escort or extra person may be required to check clearances.
| Load | Escorts | Source |
|---|---|---|
| 14 feet wide or more | One; may be required below 14 feet per the escort map | 18.19.8.81 |
| Over 110 feet 1 inch to 120 feet 1 inch long | One | 18.19.8.82 |
| Over 120 feet 1 inch long | Two | 18.19.8.82 |
| Over 16 feet high | Escort or extra person may be required | 18.19.8.83 |
| 20 feet wide or more | Police escort at NMDOT's discretion | 18.19.8.84 |
New Mexico certifies the escort vehicle. The state DOT or Department of Public Safety inspects it, and the certification lasts a year or until the insurance lapses. The driver must be at least 18, licensed under the home state's escort-driver rules, and carry the vehicle certificate and escort map (18.19.8.90). Details are in pilot car requirements by state.
When can an oversize load move in New Mexico?
From 30 minutes before sunrise to 30 minutes after sunset, on any day of the week. That window is an hour longer than the daylight day itself. Night movement needs the permit to allow it. Holidays, weather and four cities add stops.
"Unless continuous movement is specifically allowed on a special permit, there shall be no movement thirty minutes after sunset until thirty minutes before sunrise." — 18.19.8.24(A) NMAC. Verified October 14, 2026.
- Albuquerque and Rio Rancho: no movement 7 to 9 a.m. or 4 to 7 p.m. on weekdays.
- Santa Fe and Las Cruces: no movement 7 to 9 a.m. or 4 to 6 p.m. on weekdays, plus named stretches of I-25, U.S. 285 and I-10.
- Holidays: no movement all day on New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas.
- Weather: no movement in wind of 25 miles per hour or more, or under 1,000 feet of visibility.
- Night caps: a continuous-movement permit tops out at 10 feet wide, 14 feet 6 inches high, 120 feet long and 140,000 pounds.
What signs, flags and lights does New Mexico require?
New Mexico requires OVERSIZE signs front and rear, at least 5 feet by 12 inches, bright yellow with black letters 10 inches high and 1 inch wide. OVERWIDTH, OVERLENGTH or OVERHEIGHT may replace the word. Flags at least 18 inches on a side mark the widest corners and long overhangs.
At night, an overwidth or overlength load needs at least one amber light at the rear and two on the power unit (18.19.8.25, .33, .34). Compare other states in sign requirements by state.
What is a superload in New Mexico?
The rule does not define the word. Over 170,000 pounds gross, a load needs NMDOT approval and an engineering analysis (18.19.8.40). At 15 feet 6 inches high or more, a route survey is required; over 18 feet, written utility certification.
Use This Check In RouteAll
After receiving the issued permit, use RouteAll’s permit-to-GPS workflow to compare its highway sequence with a reviewable map. Keep local permissions, travel windows and escort instructions available separately. RouteAll does not issue permits or amend the authorized roads.
Before you roll
Buy the permit through NM-OPS before you reach the state line. At 14 feet wide, line up an escort with a New Mexico-certified vehicle. Use the longer daylight window, but stay out of Albuquerque from 4 to 7 p.m. and off every road the permit does not name.
Common questions
How much is a New Mexico oversize permit?
A single-trip special permit costs $25 under NMSA 66-7-413, plus a weight charge for loads over 86,400 pounds. It is valid 5 days, one way. An annual permit costs $250.
When do you need an escort in New Mexico?
Once the load is 14 feet wide, or over 110 feet 1 inch long. Two escorts are required over 120 feet 1 inch long. The escort vehicle must hold a New Mexico certification from the DOT or the Department of Public Safety, and the driver must be 18 and meet the home state's escort-driver licensing rules.
What hours can oversize loads travel in New Mexico?
From 30 minutes before sunrise to 30 minutes after sunset, any day of the week except the six holidays. Night movement needs the permit to allow it. Albuquerque, Rio Rancho, Santa Fe and Las Cruces close at weekday rush hours.
Further reading
Sources
- 18.19.8 NMAC, sections 7, 24 to 26, 33 to 40, 50, 51 and 81 to 90.
- NMSA 66-7-402, 66-7-404, 66-7-409, 66-7-410 and 66-7-413.
- NMDOT, NM-OPS permit system.
RouteAll reads the permit you provide. It does not issue permits or guarantee compliance. The driver remains responsible for the load. New Mexico rules change, and your permit can be stricter than the rule; verify against the permit and the New Mexico permit office before every move.