The New Mexico answer
Legal limits
First escort trigger
- Width
- 14' or morerev. · read
- Height
- No trigger published
- Length
- over 110'1"rev. · read
- Rear overhang
- No trigger published
- Gross weight
- No trigger published
What the paper costs
- Single-trip base
- $25 · caveat ↓rev. · read
- Transaction / card
- None published · caveat ↓rev. · read
- How overweight is priced
- Priced by the milerev. · read
- Superload above
- 170,000 lb and up · caveat ↓rev. · read
The short version: a New Mexico single-trip permit starts at $25 before bands, overweight and the transaction charge; an escort is first required at 14' or more wide; and the load becomes a superload at over 170,000 lb. Everything below carries the New Mexico document it came from, that document's own revision date, and the date we read it.
1. Where the load goes next
The jurisdictions this one borders, each chip carrying the fact that decides whether that crossing is the expensive one — so the row is itself a small comparison. A multi-state lane is the actual job, and from here it is one click per state rather than a return to an alphabetical index.
ArizonaEscort at over 10'ColoradoEscort at over 8'6" (worst road class)OklahomaEscort at over 12' (worst road class)TexasEscort at 14' or moreMexicoInternational border — outside this corpus
2. New Mexico legal limits
Anything over one of these needs a permit. Every value links to the document that sets it.
| Measure | Legal limit |
|---|---|
| Width | 8'6"rev. · read NMSA 1978 § 66-7-402: "The total outside width of any vehicle or its load, excepting mirrors, shall not exceed eight feet six inches. Safety devices up to three inches on either side of the vehicle and recreational vehicle appurtenances, including retracting awnings, up to six inches on either side of the vehicle are also excepted." EXCLUSIVE ("shall not exceed") — 102 in is legal, 102.5 in is not. Unlike Arizona there is no 96 in baseline and no designated-highway split: 102 in is the statewide figure. The mirror, safety-device (+3 in a side) and RV-appurtenance (+6 in a side) exceptions are recorded and not evaluated, because a quote states no device dimensions. |
| Height | 14'rev. · read NMSA 1978 § 66-7-404(A): "A vehicle shall not exceed a height of fourteen feet." EXCLUSIVE. 14 FT, NOT 13 FT 6 IN — a 13 ft 9 in load needs no New Mexico permit, where it would need one in Arizona. Corroborated rule-side at 18.19.8.36(A) NMAC, which also states the reducibility test: "Special permits may be issued for vehicles, combinations or loads in excess of the statutory limit for heights of 14 feet. When the substitution of a different type of trailer would make the vehicle or load 14 or less in height, then the load shall be considered reducible and such substitution shall be made." |
| Semitrailer length | 57'6"rev. · read NMSA 1978 § 66-7-404(D): on the interstate system, on qualifying federal-aid primary highways designated by the US Secretary of Transportation and on highways designated by the department of transportation by rule, a combination "may exceed an overall length limitation of sixty-five feet, provided that the length of the semitrailer in a truck tractor semitrailer combination does not exceed fifty-seven feet six inches and the length of the semitrailer or trailer in a truck tractor semitrailer-trailer combination does not exceed twenty-eight feet six inches." EXCLUSIVE. The 57 ft 6 in figure is the component limit that REPLACES the 65 ft overall cap on those routes; off them the 65 ft cap in `overallLengthIn` governs the whole combination. |
| Overall length | 65'rev. · read NMSA 1978 § 66-7-404(B): "A combination of vehicles, unless otherwise exempted in this section, shall not exceed an overall length of sixty-five feet, exclusive of front and rear bumpers." EXCLUSIVE, and a GENUINE CAP rather than a conditional one. The exemptions are stated and not evaluated here: § 66-7-404(D) lifts it on the interstate, on qualifying federal-aid primary highways and on NMDOT-designated routes provided the 57 ft 6 in semitrailer limit holds (18.19.8.38 NMAC then allows a 20-mile run off the designated highway for food, fuel, repairs, rest, terminals and delivery); § 66-7-404(E) exempts automobile, boat and beverage transporters and munitions carriers using dromedary equipment per 23 CFR 658.13; § 66-7-404(F) allows saddle-mount combinations to 97 ft. A SINGLE VEHICLE is capped separately at 40 ft (45 ft for a motor home) by § 66-7-404(B), restated at 18.19.8.37(A) NMAC, and that figure has no field in this schema. |
| Kingpin to rear axle | None published |
| Front overhang | None published |
| Rear overhang | None published |
| Gross weight | 86,400 lbrev. · read NMSA 1978 § 66-7-410(B): the gross-weight table's top row, "56 or over → 86,400". NOT 80,000 — AND THE FEE DEPENDS ON IT. § 66-7-413(D) charges the overweight term on the excess over 86,400 lb, so substituting the federal figure would bill 6,400 lb of phantom excess on a load at New Mexico's own legal ceiling. THE TABLE IS DISTANCE-ONLY AND HAS NO AXLE-COUNT AXIS: § 66-7-410(A) caps "the total gross weight with load imposed upon the highway by any one group of two or more consecutive axles" at "the gross weight given for the respective distance between the first and last axle of the group of axles measured longitudinally to the nearest foot", running 4 ft → 34,320; 5 → 35,100; 6 → 35,880; 7 → 36,660; 8 → 37,440; 9 → 38,220; 10 → 39,000; 11 → 39,780; 12 → 40,560; 13 → 41,340; 14 → 42,120; 15 → 42,900; 16 → 43,680; 17 → 44,460; 18 → 45,240, and § 66-7-410(B) continuing 19 ft → 53,100 up to "56 or over → 86,400". § 66-7-410(C) rounds the spacing: "The distance between the centers of the axles shall be measured to the nearest even foot. When a fraction is exactly one-half, the next larger whole number shall be used." Two statutory increases are recorded and not applied: +400 lb for idle-reduction technology, and a natural-gas-vehicle allowance per axle-distance category "established by the division by rule" — a figure the division has not published anywhere retrievable (§ 66-7-410(D)). |
| Single axle | 21,600 lbrev. · read NMSA 1978 § 66-7-409(A): "the gross weight imposed on the highway by the wheels of any one axle of a vehicle shall not exceed twenty-one thousand six hundred pounds nor shall any one wheel carry a load in excess of eleven thousand pounds." EXCLUSIVE, and 21,600 lb IS 1,600 lb ABOVE THE FEDERAL 20,000 — a 21,000 lb single axle that needs a permit in Arizona is legal in New Mexico, and because the fee is charged on the excess over the legal limit, carrying the federal number would invent both a requirement and a fee. § 66-7-409(B) defines a single-axle load as the wheels between two parallel transverse vertical planes "forty inches or less" apart. Two further caps have no field in this schema and are recorded here: the SINGLE WHEEL at 11,000 lb, and § 66-7-409(C)'s tyre limit — "No wheel equipped with pneumatic, solid rubber or cushion tires shall carry a load in excess of six hundred pounds for each inch of tire width" — neither of which is evaluated, because a quote states no wheel or tyre dimensions. |
| Tandem axle | 34,320 lbrev. · read NEW MEXICO PUBLISHES NO STANDALONE TANDEM FIGURE. § 66-7-409(B): "A tandem axle load is defined as the total load transmitted to the road by all wheels whose centers are included between two parallel transverse vertical planes more than forty inches apart but less than one hundred twenty inches apart ... The allowed load on tandem axles shall not exceed the gross weight given in Section 66-7-410 NMSA 1978 FOR THE RESPECTIVE DISTANCE BETWEEN THE AXLES." 34,320 lb IS THE § 66-7-410(A) TABLE VALUE AT 4 FT OF SPACING — the ordinary closed tandem — and the table rises across the tandem band to 35,100 at 5 ft, 35,880 at 6 ft, 36,660 at 7 ft and 37,440 at 8 ft. EVERY ONE OF THOSE IS ABOVE THE FEDERAL 34,000 lb, so substituting the federal number would invent a permit requirement on a legal New Mexico tandem and, because § 66-7-413(D) charges on the excess over the legal limit, invent a fee with it. A tandem spread wider than 4 ft will be read as overweight by this single row; that over-states the requirement rather than hiding one. Spacing is measured per § 66-7-410(C), "to the nearest even foot", with an exact half going to the next larger whole number. |
3. The New Mexico escort ladder
Not one number per dimension — the whole staircase. Each row is a condition the state actually publishes, what it requires when that condition holds, and the clause it comes from. Where a rule requires escorts and the source states no number, the row says that in the source's own words rather than reporting no requirement.
| When | What is required | Source |
|---|---|---|
| width of 14' or more | Escorts required; the source states no number — at least 1. Published as: “Escort vehicles are required for the movement of all widths at or exceeding 14 feet, and may be required for widths less than 14 feet depending on the routes to be traveled and in accordance with established widths for certain highways identified in the escort vehicle map developed and maintained by the DOT.” |
PRIMARY, retrieved in full (97 KB, all 70+ se…rev. · read |
| overall length from 110'1" (exclusive) to 120'1" | 1 certified escort |
PRIMARY, retrieved in full (97 KB, all 70+ se…rev. · read |
| overall length over 120'1" | 2 certified escorts |
PRIMARY, retrieved in full (97 KB, all 70+ se…rev. · read |
The first trigger in each dimension
| Measurement | First escort trigger | First police escort trigger |
|---|---|---|
| Width | 14' or morerev. · read | None published |
| Height | None published | None published |
| Length | over 110'1"rev. · read | None published |
| Rear overhang | None published | None published |
| Gross weight | None published | None published |
The same rules restated in plain sentences8 rules
- At or exceeding 14 ft wide — escort vehicles required; New Mexico publishes no count and assigns no position by dimension — PRIMARY, retrieved in full (97 KB, all 70+ sections) from the official NMAC host. The part states "EFFECTIVE DATE: February 12, 2016, unless a later date is cited at the end of a section"; the escort sections (.81 to .98), the projecting-load section (.39) and the 170,000 lb engineering-analysis section (.40) carry the later stamp "A, 6/1/2022", which is the document's own latest date and is recorded here. Rows taken from sections where the captured text shows NO later stamp — .36 (reducibility, route survey, utility certification) and .50 (single-trip validity) — are dated from the part's own 2/12/2016 effective date instead, which is the earliest instant consistent with the evidence. Note the agency split: DPS issues the RULE, NMDOT issues the PERMIT after Laws 2021 S.B. 186. rev. · read
- Over 102 in and under 14 ft wide — escorts may be required by NMDOT's escort vehicle map, which we do not hold — PRIMARY, retrieved in full (97 KB, all 70+ sections) from the official NMAC host. The part states "EFFECTIVE DATE: February 12, 2016, unless a later date is cited at the end of a section"; the escort sections (.81 to .98), the projecting-load section (.39) and the 170,000 lb engineering-analysis section (.40) carry the later stamp "A, 6/1/2022", which is the document's own latest date and is recorded here. Rows taken from sections where the captured text shows NO later stamp — .36 (reducibility, route survey, utility certification) and .50 (single-trip validity) — are dated from the part's own 2/12/2016 effective date instead, which is the earliest instant consistent with the evidence. Note the agency split: DPS issues the RULE, NMDOT issues the PERMIT after Laws 2021 S.B. 186. rev. · read
- Over 110 ft 1 in and up to 120 ft 1 in overall — one escort; position not assigned by the rule — PRIMARY, retrieved in full (97 KB, all 70+ sections) from the official NMAC host. The part states "EFFECTIVE DATE: February 12, 2016, unless a later date is cited at the end of a section"; the escort sections (.81 to .98), the projecting-load section (.39) and the 170,000 lb engineering-analysis section (.40) carry the later stamp "A, 6/1/2022", which is the document's own latest date and is recorded here. Rows taken from sections where the captured text shows NO later stamp — .36 (reducibility, route survey, utility certification) and .50 (single-trip validity) — are dated from the part's own 2/12/2016 effective date instead, which is the earliest instant consistent with the evidence. Note the agency split: DPS issues the RULE, NMDOT issues the PERMIT after Laws 2021 S.B. 186. rev. · read
- Over 120 ft 1 in overall — two escorts; positions not assigned by the rule — PRIMARY, retrieved in full (97 KB, all 70+ sections) from the official NMAC host. The part states "EFFECTIVE DATE: February 12, 2016, unless a later date is cited at the end of a section"; the escort sections (.81 to .98), the projecting-load section (.39) and the 170,000 lb engineering-analysis section (.40) carry the later stamp "A, 6/1/2022", which is the document's own latest date and is recorded here. Rows taken from sections where the captured text shows NO later stamp — .36 (reducibility, route survey, utility certification) and .50 (single-trip validity) — are dated from the part's own 2/12/2016 effective date instead, which is the earliest instant consistent with the evidence. Note the agency split: DPS issues the RULE, NMDOT issues the PERMIT after Laws 2021 S.B. 186. rev. · read
- Over 16 ft high — an escort or a second person may be required at NMDOT's discretion — PRIMARY, retrieved in full (97 KB, all 70+ sections) from the official NMAC host. The part states "EFFECTIVE DATE: February 12, 2016, unless a later date is cited at the end of a section"; the escort sections (.81 to .98), the projecting-load section (.39) and the 170,000 lb engineering-analysis section (.40) carry the later stamp "A, 6/1/2022", which is the document's own latest date and is recorded here. Rows taken from sections where the captured text shows NO later stamp — .36 (reducibility, route survey, utility certification) and .50 (single-trip validity) — are dated from the part's own 2/12/2016 effective date instead, which is the earliest instant consistent with the evidence. Note the agency split: DPS issues the RULE, NMDOT issues the PERMIT after Laws 2021 S.B. 186. rev. · read
- At or above 15 ft 6 in high — a route survey is required before the permit issues — PRIMARY, retrieved in full (97 KB, all 70+ sections) from the official NMAC host. The part states "EFFECTIVE DATE: February 12, 2016, unless a later date is cited at the end of a section"; the escort sections (.81 to .98), the projecting-load section (.39) and the 170,000 lb engineering-analysis section (.40) carry the later stamp "A, 6/1/2022", which is the document's own latest date and is recorded here. Rows taken from sections where the captured text shows NO later stamp — .36 (reducibility, route survey, utility certification) and .50 (single-trip validity) — are dated from the part's own 2/12/2016 effective date instead, which is the earliest instant consistent with the evidence. Note the agency split: DPS issues the RULE, NMDOT issues the PERMIT after Laws 2021 S.B. 186. rev. · read
- Over 18 ft high — written utility-company certification required; cost and lead time unpublished — PRIMARY, retrieved in full (97 KB, all 70+ sections) from the official NMAC host. The part states "EFFECTIVE DATE: February 12, 2016, unless a later date is cited at the end of a section"; the escort sections (.81 to .98), the projecting-load section (.39) and the 170,000 lb engineering-analysis section (.40) carry the later stamp "A, 6/1/2022", which is the document's own latest date and is recorded here. Rows taken from sections where the captured text shows NO later stamp — .36 (reducibility, route survey, utility certification) and .50 (single-trip validity) — are dated from the part's own 2/12/2016 effective date instead, which is the earliest instant consistent with the evidence. Note the agency split: DPS issues the RULE, NMDOT issues the PERMIT after Laws 2021 S.B. 186. rev. · read
- At or over 20 ft wide — police escorts may be required at NMDOT's discretion; no rate is published — PRIMARY, retrieved in full (97 KB, all 70+ sections) from the official NMAC host. The part states "EFFECTIVE DATE: February 12, 2016, unless a later date is cited at the end of a section"; the escort sections (.81 to .98), the projecting-load section (.39) and the 170,000 lb engineering-analysis section (.40) carry the later stamp "A, 6/1/2022", which is the document's own latest date and is recorded here. Rows taken from sections where the captured text shows NO later stamp — .36 (reducibility, route survey, utility certification) and .50 (single-trip validity) — are dated from the part's own 2/12/2016 effective date instead, which is the earliest instant consistent with the evidence. Note the agency split: DPS issues the RULE, NMDOT issues the PERMIT after Laws 2021 S.B. 186. rev. · read
4. New Mexico single-trip permit fees
| Charge | Amount |
|---|---|
| Single-trip base | $25rev. · read NMSA 1978 § 66-7-413(D): "Special permits for a single trip for a vehicle or combination of vehicles or load thereon of excessive weight, width, length and height may be issued by the department of transportation for a single vehicle for a fee of twenty-five dollars ($25.00) plus ..." ONE FLAT $25 COVERS EVERY OVERSIZE DIMENSION — width, length and height together — with no dimensional banding and no mileage term; the per-mile charge attaches only to weight over 86,400 lb. VALIDITY IS FIVE DAYS, NOT THREE: 18.19.8.50 NMAC, "Special permits for single-trip movements are issued for a single, one-way movement. A single-trip special permit is valid for five days." That section carries no later amendment stamp, so it dates from the rule's own 2/12/2016 effective date; the three days published by brokers is not in the rule. The other products are not single-trip alternatives and are not applied: $250 annual (§ 66-7-413(C), weight to 140,000 lb); $35 single trip / $120 annual for liquid-hauling tank vehicles (§ 66-7-413.4, barred from the interstate system, barred to combinations and capped at 86,400 lb gross); a $25 floor on manufactured-home self-issued permits (§ 66-7-413(I)); a $15 ceiling on implements-of-husbandry dealer permits (§ 66-7-413(J)); and $400 / $100-per-added-county for the specialized-haul multiple-trip permit (18.19.8.55(B) NMAC). |
| Transaction / card | None publishedrev. · read A SOURCED ZERO, NOT AN EMPTY LIST — the fee provisions were read and they charge nothing extra. NMSA 1978 § 66-7-413 was read in full (subsections A through O) and all of 18.19.8 NMAC was searched for every occurrence of "fee", "fees" and "$": no transaction, processing, service, issuance or credit-card charge appears in either. The only other dollar figures in the rule are the specialized-haul multiple-trip permit ($400 for four contiguous counties and three interstates, $100 per additional county, 18.19.8.55(B)) and the escort insurance minimums ($50,000 bodily injury per person, $100,000 per accident, $25,000 property damage, 18.19.8.87/.88, mirroring § 66-7-413(K)). |
| Route analysis review | Not yet covered |
| Route with no bridges | Not yet covered |
New Mexico has more than one permit issuer. A state total can be complete and still be missing a whole permit.
- New Mexico municipalities and local highway authorities — A route requiring a police escort passes through a municipality, or the move is entirely within one; and generally where the move uses highways under local rather than state jurisdiction.. We do not hold this authority's fee schedule, so the leg goes to review rather than being quoted short. 18.19.8 NMAC — Size and Weight of Vehicles and Loads (Title 18 Transportation and Highways, Chapter 19 Motor Vehicle Procedures, Licenses, Permits, Part 8)
5. How New Mexico prices overweight
Priced by the mile. NMSA 1978 § 66-7-413(D): "a fee of twenty-five dollars ($25.00) plus the product of two and one-half cents ($.025) for each two thousand pounds in excess of eighty-six thousand four hundred pounds or major fraction thereof MULTIPLIED BY THE NUMBER OF MILES TO BE TRAVELED by the vehicle or combination of vehicles ON THE HIGHWAYS OF THIS STATE." A per-2,000-lb-increment-per-mile charge over an 86,400 lb base — not a flat fee, not weight bands, and not a ton-mile rate on the whole load. In-state mileage is required before any load over 86,400 lb can be priced.
The distance charge, with its rounding
Rounding is not a detail here: the same rate over the same miles can differ by a whole increment depending on which pounds are rounded and in which direction, so the rule is printed with the source's own words rather than applied silently.
| Gross weight | Axles | Rate and rounding | Source |
|---|---|---|---|
| 86,401 lb and up | any | $0.03 per mile for each 2,000 lb above 86,400 lba part increment is charged in full ("or fraction thereof") |
PRIMARY, and A DIFFERENT DOCUMENT CLASS FROM …rev. · read |
6. New Mexico seasonal posting windows
A permit priced against an unposted-road assumption in March is simply wrong, and wrong in the expensive direction. This is the window we watch, the basis for that window in the state's own orders or statute, and the authority that posts it.
New Mexico is not in the seasonal-restriction registry, so we hold no posting window for it and are not inventing one.
7. New Mexico's superload threshold
Above one of these, the state stops issuing over the counter and prices the move after an engineering review.
| Trigger | Threshold |
|---|---|
| Gross weight | over 170,000 lbrev. · read NMSA 1978 § 66-7-413.2(A): "All vehicles with a gross vehicle weight IN EXCESS OF one hundred seventy thousand pounds shall require a special permit as provided for in Section 66-7-413 NMSA 1978, and no such permit shall be issued unless (1) an engineering investigation and review have been conducted to (a) establish whether the move could be made without visible or documented damages to the portion of road or bridges ...; (b) ... to any private facilities along the road ...; and (c) estimate the cost for any necessary modifications the move may cause." EXCLUSIVE — 170,000 lb exactly is not a superload; 170,001 lb is. Corroborated verbatim at 18.19.8.40(A)-(B) NMAC, which also makes it not-over-the-counter: the application "shall be forwarded to the DOT ... for approval" and "no special permit shall be issued ... unless an engineering analysis has been conducted for the proposed route and the move has been approved by the DOT", with the permit issuing only "upon payment of the proper fee" (18.19.8.40(F)). |
| Width | None published |
| Height | None published |
| Length | None published |
| Short axle spacing | Not yet covered |
8. Route survey and bridge review
The dimensions at which New Mexico triggers a physical route inspection or an engineering review, and what the agency charges to review it.
| Measurement | Inspection / review trigger |
|---|---|
| Width | Not yet covered |
| Height | 15'6" or morerev. · read 18.19.8.36(C) NMAC: "If a special permit is requested for a height of 15 feet six inches OR GREATER, a route survey is required." INCLUSIVE — exactly 15 ft 6 in triggers it. Contrast 18.19.8.36(B), which only requires the applicant to "check the desired route for clearance" between 14 ft and 15 ft 6 in, and 18.19.8.36(D), whose utility-certification requirement above 18 ft is exclusive. The survey is the APPLICANT'S own physical measurement (defined at 18.19.8.7(R)) and attracts no state fee; 18.19.8.30(B) makes it "valid for a period of fourteen days but ... subject to change by the DOT at any time". |
| Length | Not yet covered |
9. Police escorts
Charges exist and no schedule is published. NEW MEXICO AUTHORISES A FEE IN SO MANY WORDS AND STATES NO AMOUNT. 18.19.8.84 NMAC requires a police escort "for movement of structures or loads with a width of 20 feet or more" at DOT discretion and provides that "The DOT may ... charge a fee for the coordination and provision of police escorts" — an express power to charge, with no figure attached. 18.19.8 NMAC (effective 12 February 2016, last amended 1 June 2022) was read across its escort sections 18.19.8.80 to 18.19.8.86 and its fee provisions; the only dollar amounts in it are the $400.00 specialized-haul permit and the $100.00 per additional county. THE $300.00 PER DAY FIGURE IS NOT ADOPTED. Four commercial permit services quote it identically and it appears nowhere in 18.19.8 NMAC or on NMDOT's own permit pages — the Nevada precedent exactly, where a number that only resellers print is not a published rate.
This is a positive finding: we searched and there is nothing to quote. It is not the same as "no police escort is ever required here".
10. When you can move it
Holiday, curfew and night-travel windows are not yet encoded for New Mexico. The seasonal picture — which is a different question — is in section 6 above.
Why those windows are absent rather than estimated
They are not guessed at here. What we do publish is the seasonal weight-restriction picture, with the date we last read each state's own bulletin — a curfew invented from a plausible pattern is worth less than an honest gap, because a reader cannot tell the two apart on the page.
11. Permit office
The agency behind each figure above is linked from that figure. We publish no per-state permit-office phone number.
Why there is no phone number here
We are not publishing per-state permit-office phone numbers yet, and the reason is worth stating: the two seed lists available for them are both demonstrably stale — the federal one gives two different states the same phone number — and a wrong number on a page like this costs somebody a morning. The agency behind each figure above is linked from that figure, which is the part we can stand behind today.
12. What this does not include
Named rather than gestured at, because each of these can exceed the permit itself. Every item is listed; open one for why it is excluded.
Line haul, fuel and driver time
This is a permit fee, not a freight rate.
Civilian pilot car rates
We hold no rate data, and the two commercial sites that publish market rates disagree by nearly a factor of two on the same service.
Route-survey engineering
The agency's review fee is shown where the state publishes one; the engineer's own fee is a private cost with no schedule.
Bonds and escrow
Set per move by the agency, and in at least one state the escort is billed at actual cost against it.
Utility coordination and line lifts
Arranged with each utility, priced by each utility.
Second-issuer permits
A toll, bridge or city authority inside the same state issues its own permit, and a state total that omits it is missing a whole permit.
Need a pilot car for this lane? Browse the pilot car & escort directory.
13. Every source behind this page (6)
Every document behind New Mexico6 sources
- 18.19.8 NMAC — Size and Weight of Vehicles and Loads (Title 18 Transportation and Highways, Chapter 19 Motor Vehicle Procedures, Licenses, Permits, Part 8) — New Mexico State Records Center and Archives (official NMAC host); issuing agency of the rule is the Department of Public Safety — PRIMARY, retrieved in full (97 KB, all 70+ sections) from the official NMAC host. The part states "EFFECTIVE DATE: February 12, 2016, unless a later date is cited at the end of a section"; the escort sections (.81 to .98), the projecting-load section (.39) and the 170,000 lb engineering-analysis section (.40) carry the later stamp "A, 6/1/2022", which is the document's own latest date and is recorded here. Rows taken from sections where the captured text shows NO later stamp — .36 (reducibility, route survey, utility certification) and .50 (single-trip validity) — are dated from the part's own 2/12/2016 effective date instead, which is the earliest instant consistent with the evidence. Note the agency split: DPS issues the RULE, NMDOT issues the PERMIT after Laws 2021 S.B. 186.
rev. · read - New Mexico House Bill 176, Final Version, 2016 Regular Session — §§ 2, 3 (amending NMSA 1978 §§ 66-7-409, 66-7-410) — New Mexico Legislature — PRIMARY, final enacted bill text. Source of the 21,600 lb single axle, the 11,000 lb single wheel, the spacing-derived tandem figure and the 86,400 lb maximum gross. THE HIGHEST CURRENCY RISK IN THIS FILE: this is the last bill identified as amending §§ 66-7-409/410, and because the codified host was captcha-walled it could not be confirmed that no later amendment exists. 2026 H.B. 286 (heavy-duty electric vehicle weight allowance) is INTRODUCED ONLY and is not law.
rev. · read - New Mexico House Bill 590, Final Version, 2001 Regular Session — §§ 4, 5 (amending NMSA 1978 §§ 66-7-402, 66-7-403) — New Mexico Legislature — PRIMARY, final enacted bill text; same document class caveat as S.B. 186. Source of the 102 in legal width and of the passenger-vehicle projecting-load rule. Justia's 2025 compilation-history notes describe the 2001 amendment as the most recent to § 66-7-402, but that URL returns 403 to automated retrieval and only an indexed snippet was readable, so the currency check is WEAK and is cited here for nothing else.
rev. · read - New Mexico Senate Bill 186, Final Version, 2021 Regular Session — §§ 10, 13, 14, 15 (amending NMSA 1978 §§ 66-7-404, 66-7-413, 66-7-413.2, 66-7-413.4) — New Mexico Legislature — PRIMARY, and A DIFFERENT DOCUMENT CLASS FROM THE CODIFICATION — this is the final enacted bill text on the legislature's own host, used because nmonesource.com (the NM Compilation Commission's official host for the codified NMSA 1978) is captcha-walled and returned no content. Source of the 14 ft height, the 57 ft 6 in semitrailer, the 65 ft overall combination cap, the $25 base fee, the $0.025 per-2,000-lb-per-mile overweight term, the >170,000 lb superload trigger and the permit-issuer provisions. The act prints no calendar date and contains no effective-date clause; it also transferred the issuing agency from DPS to NMDOT. Residual risk: a later amendment not captured here.
rev. · read - New Mexico Senate Bill 496, 2007 Regular Session — "ELIMINATING FEES FOR CERTAIN POLICE ESCORTS" (§§ 7, 11, amending NMSA 1978 §§ 66-7-314, 66-7-413) — New Mexico Legislature — PRIMARY. Cited ONLY to prove a repeal, never for a live figure. The introduced version at https://www.nmlegis.gov/sessions/07%20Regular/bills/senate/SB0496.html carries the bracketed-deletion markup showing the $300-per-day police escort charge struck from both § 66-7-413(B) and § 66-7-314(B); the final version carries the deletions through and a search for "three hundred dollars" in it returns nothing. Corroborated by the 2021 re-enactment of § 66-7-413, which runs A through O with no escort-fee subsection.
rev. · read - NMDOT — Business Support: Permits — New Mexico Department of Transportation — PRIMARY host, and cited for an ABSENCE: the permitting agency's own page was fetched and publishes NO oversize/overweight fee schedule of any kind. The only dollar figure on it is an unrelated $500 telecommunications permit application fee. The page states no revision date. An unofficial copy of an "Oversize/Overweight Permit Manual" exists at openei.org; it is not on a New Mexico host, it was not used, and it must not be treated as citable.
undated document · read
Questions
How much is an oversize permit in New Mexico?
The single-trip base is $25, before the dimension bands, the overweight component and the transaction charge. The base alone is rarely what is paid.
When does New Mexico require a pilot car?
The first width trigger is 14' or more.
What is a superload in New Mexico?
New Mexico's published gross-weight superload line is over 170,000 lb. It is not 80,000 lb; that is the federal legal gross limit, not a superload threshold.