23
Primary Highway System
Maximum weights for vehicles on the Interstate Highway System,
and noninterstate federal and state highways
Table 3
Distance in Number of consecutive axles
feet between
axle centers Two axles Three axles Four axles Five axles Six axles Seven axles
4 34,000 34,000
5 34,000 34,000
6 34,000 34,000
7 34,000 34,000
8 34,000 34,000
8’1” 38,000 42,000
9 39,000 42,500
10 40,000 43,500 48,500
11 40,000 44,000 49,500
12 40,000 45,000 50,000
13 40,000 45,500 50,500 56,000
14 40,000 46,500 51,500 57,000
15 40,000 47,000 52,000 57,500
16 40,000 48,000 52,500 58,000
17 40,000 48,500 53,500 58,500 64,000
18 40,000 49,500 54,000 59,000 65,000
19 40,000 50,000 54,500 60,000 65,500
20 40,000 51,000 55,500 60,500 66,000 71,500
21 40,000 51,500 56,000 61,000 66,500 72,500
22 40,000 52,500 56,500 61,500 67,000 73,000
23 40,000 53,000 57,500 62,500 68,000 73,500
24 40,000 54,000 58,000 63,000 68,500 74,000
25 40,000 54,500 58,500 63,500 69,000 74,500
26 40,000 55,500 59,500 64,000 69,500 75,000
27 40,000 56,000 60,000 65,000 70,000 76,000
28 40,000 57,000 60,500 65,500 71,000 76,500
29 40,000 57,500 61,500 66,000 71,500 77,000
30 40,000 58,500 62,000 66,500 72,000 77,500
31 40,000 59,000 62,500 67,500 72,500 78,000
32 40,000 60,000 63,500 68,000 73,000 78,500
33 40,000 60,000 64,000 68,500 74,000 79,500
34 40,000 60,000 64,500 69,500 74,500 80,000
35 40,000 60,000 65,500 70,000 75,000 80,000
36 40,000 60,000 68,000 70,500 75,500 80,000
37 40,000 60,000 68,000 71,000 76,000 80,000
38 40,000 60,000 68,000 72,000 77,000 80,000
39 40,000 60,000 68,000 72,500 77,500 80,000
40 40,000 60,000 68,500 73,000 78,000 80,000
41 40,000 60,000 69,500 73,500 78,500 80,000
42 40,000 60,000 70,000 74,000 79,000 80,000
43 40,000 60,000 70,500 75,000 80,000 80,000
44 40,000 60,000 71,500 75,500 80,000 80,000
45 40,000 60,000 72,000 76,000 80,000 80,000
46 40,000 60,000 72,500 76,500 80,000 80,000
47 40,000 60,000 73,500 77,500 80,000 80,000
48 40,000 60,000 74,000 78,000 80,000 80,000
49 40,000 60,000 74,500 78,500 80,000 80,000
50 40,000 60,000 75,500 79,000 80,000 80,000
51 40,000 60,000 76,000 80,000 80,000 80,000
52 40,000 60,000 76,500 80,000 80,000 80,000
53 40,000 60,000 77,500 80,000 80,000 80,000
54 40,000 60,000 78,000 80,000 80,000 80,000
55 40,000 60,000 78,500 80,000 80,000 80,000
56 40,000 60,000 79,500 80,000 80,000 80,000
57 40,000 60,000 80,000 80,000 80,000 80,000
Other than a special
farm plated truck,
CMVs with six or
seven axles operating
on noninterstate
highways may also
use Table 2.