Federal & State Regulations | Size/Weight limits - District of Columbia

State Info

Dimension	National Network	State and Other Supplemental Highways
Width:	8' 6"	8' 8' 6" for 15 or greater passenger buses
Height:	13' 6"	13' 6"
Length:	National Network	State and Other Supplemental Highways
Bus	60'	60'
Articulated bus	60'	60'
Straight Trucks	40'	40'
Straight truck and trailer	60'	55'
Tractor-semitrailer combinations	No limit	55'
Semitrailer	53' Route specific. See KPRA.	48' Route specific
Tractor-twin-trailer combination	No limit Route specific	No limit Route specific
Trailers of twin-trailer combinations	28'	28' Route specific
Saddlemount	Up to 3	Up to 3
Kingpin to rearaxle	41' to rear axle	NS
Weight:	Interstate and Defense Highways	State and Other Supplemental Highways
Single axle	20,000	20,000 21,000 lb if GVW is under 73,000 lb
Tandem axle	34,000	34,000
Gross vehicle weight	80,000	80,000
Tolerances	1,000 lb on GVW	1,000 lb on GVW

Gross weight table for all highways
Distance in feet between the extremes of any group of two or more consecutive axles	Maximum weight in pounds for any group of two or more consecutive axles (wheelbases)
	2 axles	3 axles	4 axles	5 axles	6 axles
4	37,000
5	37,000
6	37,000
7	37,000
8	37,000	37,000
9	38,000	41,500
10	39,000	42,500
11	40,000	43,000
12	41,000	44,000	49,000
13	42,000	44,500	49,500
14	43,000	45,500	50,500
15		46,000	51,000
16		47,000	51,500	57,000
17		47,500	52,500	57,500
18		48,500	53,000	58,000
19		49,000	53,500	59,000
20		50,000	54,500	59,500	65,000
21		50,500	55,000	60,000	65,500
22		51,500	55,500	60,500	66,000
23		52,000	56,500	61,500	67,000
24		53,000	57,000	62,000	67,500
25		53,500	57,500	62,500	68,000
26		54,500	58,500	63,000	68,500
27		55,000	59,000	64,000	69,000
28		56,000	59,500	64,500	70,000
29		56,500	60,500	65,000	70,500
30		57,500	61,000	65,500	71,000
31		58,000	61,500	66,500	71,500
32		59,000	62,500	67,000	72,000
33		59,500	63,000	67,500	73,000
34		60,500	63,500	68,000	73,500
35		61,000	64,500	69,000	74,000
36		62,000	65,000	69,500	74,500
37		62,500	65,500	70,000	75,000
38		63,500	66,500	71,000	76,000
39		64,000	67,000	71,500	76,500
40		65,000	67,500	72,000	77,000
41			68,500	72,500	77,500
42			69,000	73,000	78,000
43			69,500	74,000	79,000
44			70,500	74,500	79,000
45			71,000	75,000	79,000
46			71,500	75,500	79,000
47			72,500	76,500	79,000
48			73,000	77,000	79,000
49			73,500	77,500	79,000
50			74,500	78,000	79,000
51			75,000	79,000	79,000

Gross weight table for all highways
Distance in feet between the extremes of any group of two or more consecutive axles	Maximum weight in pounds for any group of two or more consecutive axles (wheelbases)
	2 axles	3 axles	4 axles	5 axles	6 axles
4	37,000
5	37,000
6	37,000
7	37,000
8	37,000	37,000
9	38,000	41,500
10	39,000	42,500
11	40,000	43,000
12	41,000	44,000	49,000
13	42,000	44,500	49,500
14	43,000	45,500	50,500
15		46,000	51,000
16		47,000	51,500	57,000
17		47,500	52,500	57,500
18		48,500	53,000	58,000
19		49,000	53,500	59,000
20		50,000	54,500	59,500	65,000
21		50,500	55,000	60,000	65,500
22		51,500	55,500	60,500	66,000
23		52,000	56,500	61,500	67,000
24		53,000	57,000	62,000	67,500
25		53,500	57,500	62,500	68,000
26		54,500	58,500	63,000	68,500
27		55,000	59,000	64,000	69,000
28		56,000	59,500	64,500	70,000
29		56,500	60,500	65,000	70,500
30		57,500	61,000	65,500	71,000
31		58,000	61,500	66,500	71,500
32		59,000	62,500	67,000	72,000
33		59,500	63,000	67,500	73,000
34		60,500	63,500	68,000	73,500
35		61,000	64,500	69,000	74,000
36		62,000	65,000	69,500	74,500
37		62,500	65,500	70,000	75,000
38		63,500	66,500	71,000	76,000
39		64,000	67,000	71,500	76,500
40		65,000	67,500	72,000	77,000
41			68,500	72,500	77,500
42			69,000	73,000	78,000
43			69,500	74,000	79,000
44			70,500	74,500	79,000
45			71,000	75,000	79,000
46			71,500	75,500	79,000
47			72,500	76,500	79,000
48			73,000	77,000	79,000
49			73,500	77,500	79,000
50			74,500	78,000	79,000
51			75,000	79,000	79,000

['Size and Weight Limits']

['Sizes and weights']

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