['Longer Combination Vehicles']
['Longer Combination Vehicles']
07/19/2024
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Combination: Truck tractor and 2 trailing units—LCV
LENGTH OF THE CARGO–CARRYING UNITS: Not applicable
MAXIMUM ALLOWABLE GROSS WEIGHT: 86,400 pounds
OPERATIONAL CONDITIONS: The cargo–carrying length restriction does not apply to this combination. The length of each trailing unit is limited to 28.5 feet. This describes a two trailing unit vehicle whose operation is guaranteed by the STAA of 1982 regardless of inter–unit spacing. As long as each trailing unit is 28.5 feet long or less, cargo–carrying length is not restricted. This combination is listed as a LCV because it can exceed the 80,000–pound threshold established in the Congressional definition. The 86,400–pound gross weight limit is grandfathered for New Mexico.
WEIGHT: Single axle = 21,600 pounds. Tandem axle = 34,200 pounds. Load per inch of tire width = 600 pounds. The total gross weight with load imposed on the highway by any vehicle or combination of vehicles where the distance between the first and last axles is less than 19 feet shall not exceed that given for the respective distances in the following table:
Distance in feet between first and last axles of group | Allowed load in pounds on group of axles |
4 | 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 |
The total gross weight with load imposed on the highway by any vehicle or combination of vehicles where the distance between the first and last axles is 19 feet or more shall not exceed that given for the respective distances in the following table:
Distance in feet between first and last axles of group | Allowed load in pounds on group of axles |
19 | 53,100 |
20 | 54,000 |
21 | 54,900 |
22 | 55,800 |
23 | 56,700 |
24 | 57,600 |
25 | 58,500 |
26 | 59,400 |
27 | 60,300 |
28 | 61,200 |
29 | 62,100 |
30 | 63,000 |
31 | 63,900 |
32 | 64,800 |
33 | 65,700 |
34 | 66,600 |
35 | 67,500 |
36 | 68,400 |
37 | 69,300 |
38 | 70,200 |
39 | 71,100 |
40 | 72,000 |
41 | 72,900 |
42 | 73,800 |
43 | 74,700 |
44 | 75,600 |
45 | 76,500 |
46 | 77,400 |
47 | 78,300 |
48 | 79,200 |
49 | 80,100 |
50 | 81,000 |
51 | 81,900 |
52 | 82,800 |
53 | 83,700 |
54 | 84,600 |
55 | 85,500 |
56 and over | 86,400 |
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.
DRIVER: The driver must have a commercial driver’s license with the appropriate endorsement.
VEHICLE: No special requirements beyond normal Federal Motor Carrier or State regulations. The maximum length of the trailing units is 28.5 feet.
PERMIT: None Required.
ACCESS: STAA vehicles must by allowed reasonable access in accordance with 23 CFR 658.19.
ROUTES: All Interstate highways.
LEGAL CITATIONS:
66–7–409 NMSA 1978
66–7–410 NMSA 1978
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