Federal & State Regulations | Size/Weight limits - New Mexico

Dimension	National Network	State and Other Supplemental Highways
Width:	8' 6"	8' 6"
Height:	14'	14'
Length:	National Network	State and Other Supplemental Highways
Bus	45' may exceed	45'
Articulated bus
Straight Trucks	40'	40'
Straight truck and trailer	65'	65'
Tractor-semitrailer combinations	No limit with legal trailer	65'
Semitrailer	57' 6"	N/S
Tractor-twin-trailer combination	No limit with legal trailer	65'
Trailers of twin-trailer combinations	28' 6"	28' 6"
Boat-transporter combination	65'	N/S
Overhang limitations	3' front, 4' rear	N/S
Stinger-steered boat-transporter	75'	N/S
Overhang limitations	3' front, 4' rear	N/S
Auto-transporter	65'	N/S
Overhang limitations	3' front, 4' rear	N/S
Stinger-steered auto-transporter	75'	N/S
Overhang limitations	3' front, 4' rear	N/S
Saddlemount	97' up to 3	N/S
General overhang limitations	3' front, 7' rear on a straight truck 2' rear, no front on a trailing unit	3' front, 7' rear on a straight truck 2' rear, no front on a trailing unit
Drawbar
Dromedary
Kingpin to rearaxle
Length special limitations or restrictions
Weight:	Interstate and Defense Highways	State and Other Supplemental Highways
Steer axle	600 lb/in of tire width	600 lb/in of tire width
Single axle	21,600	21,600
Tandem axle	34,320	34,320
Tridem axle
Gross vehicle weight	86,400	86,400
Load per inch width of tire	600	600
Per wheel	11,000	11,000
Tolerances
APU allowance	400	400
Natural gas allowance	2,000	2,000
Weight special limitations or restrictions

Bridge rules

Gross weight table
Distance in feet between centers of any group of axles	Maximum Gross Weight	Distance in feet between centers of any group of axles	Maximum Gross Weight
4	34,320	30	63,000
5	35,100	31	63,900
6	35,880	32	64,800
7	36,660	33	65,700
8	37,440	34	66,600
9	38,220	35	67,500
10	39,000	36	68,500
11	39,780	37	69,300
12	40,560	38	70,200
13	41,340	39	71,100
14	42,120	40	72,000
15	42,900	41	72,900
16	43,680	42	73,800
17	44,460	43	74,700
18	45,240	44	75,600
19	53,100	45	76,500
20	54,000	46	77,400
21	54,900	47	78,300
22	55,800	48	79,200
23	56,700	49	80,100
24	57,600	50	81,000
25	58,500	51	81,900
26	59,400	52	82,800
27	60,300	53	83,700
28	61,200	54	84,600
29	62,100	55	85,500
		56 or over	86,400

The total gross weight with load limitations for any vehicle or combination of vehicles will be increased by 400 pounds if the vehicle or combination of vehicles uses idle reduction technology.

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['Size and Weight Limits']

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Size/Weight limits - New Mexico

Bridge rules