U.S. Department of Transportation
Federal Highway Administration
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202-366-4000
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
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Publication Number: FHWA-HRT-13-091 Date: November 2014 |
Publication Number: FHWA-HRT-13-091 Date: November 2014 |
Order | Class | Vehicle Description | No. of Axles | Spacing 1-2 (ft) | Spacing 2-3 (ft) | Spacing 3-4 (ft) | Spacing 4-5 (ft) | Spacing 5-6 (ft) | Spacing 6-7 (ft) | Spacing 7-8 (ft) | Spacing 8 -9 (ft) |
1 | 1 | Motorcycle | 2 | 0.1-6.0 | - | - | - | - | - | - | - |
2 | 2 | Auto, Pickup | 2 | 6.00-10.0 | - | - | - | - | - | - | - |
3 | 3 | Other (Limo, Van, RV) | 2 | 10.00-13.30 | - | - | - | - | - | - | - |
4 | 4 | Bus | 2 | 23.00-40.0 | - | - | - | - | - | - | - |
5 | 5 | 2 D | 2 | 13.30-23.0 | - | - | - | - | - | - | - |
1 | 8 | 2S1, 21 | 3 | 10.00-23.0 | 11.0-40.0 | - | - | - | - | - | - |
2 | 4 | Bus | 3 | 23.00-40.0 | 0.1-6.0 | - | - | - | - | - | - |
3 | 6 | 3 Axle | 3 | 6.00-23.0 | 0.1-6.0 | - | - | - | - | - | - |
4 | 3 | Other with 1 Axle Trlr | 3 | 10.00-13.30 | 6.0-25.0 | - | - | - | - | - | - |
5 | 2 | Auto with 1 Axle Trlr | 3 | 6.00-10.0 | 6.0-25.0 | - | - | - | - | - | - |
6 | 5 | 2D with 1 Axle Trlr | 3 | 13.30-23.0 | 6.0-25.0 | - | - | - | - | - | - |
1 | 8 | 2S2 | 4 | 10.00-23.0 | 11.0-40.0 | 2.0-12.0 | - | - | - | - | - |
2 | 8 | 3S1, 31 | 4 | 6.00-23.0 | 0.1-6.0 | 6.00-44.0 | - | - | - | - | - |
3 | 7 | 4 Axle | 4 | 6.00-23.0 | 0.1-6.0 | 0.1-6.0 | - | - | - | - | - |
4 | 3 | Other with 2 Axle Trlr | 4 | 10.00-13.30 | 6.0-25.0 | 0.1-6.0 | - | - | - | - | - |
5 | 5 | 2D with 2 Axle Trlr | 4 | 13.30 -23.0 | 6.0-25.0 | 0.1-6.0 | - | - | - | - | - |
6 | 2 | Auto with 2 Axle Trlr | 4 | 6.00-10.0 | 6.0-25.0 | 0.1-6.0 | - | - | - | - | - |
1 | 9 | 3S2 | 5 | 6.00-26.0 | 0.1-6.0 | 6.00-46.0 | 0.1-11.00 | - | - | - | - |
2 | 9 | 32 | 5 | 6.00-26.0 | 0.1-6.0 | 6.00- 23.0 | 11.0-27.0 | - | - | - | - |
3 | 11 | 2S12 | 5 | 6.00-26.0 | 11.0-26.0 | 6.00-20.0 | 11.00-26.0 | - | - | - | - |
4 | 3 | Other with 3 Axle Trlr | 5 | 10.00-13.30 | 6.0-25.0 | 0.1-6.0 | 0.1-6.0 | - | - | - | - |
5 | 5 | 2D with 3 Axle Trlr | 5 | 13.30-23.0 | 6.0-25.0 | 0.1-6.0 | 0.1-6.0 | - | - | - | - |
1 | 10 | 3S3, 33 | 6 | 6.00-26.0 | 0.1-6.0 | 0.1-46.0 | 0.1-11.0 | 0.1-11.0 | - | - | - |
2 | 12 | 3S12 | 6 | 6.00-26.0 | 0.1-6.0 | 11.00-26.0 | 6.00-24.0 | 11.00-26.0 | - | - | - |
1 | 10 | Other Class 10 Vehicles | 7 | 6.00-16.7 | 0.1-6.0 | 13.3-40.0 | 0.1-13.3 | 0.1-13.3 | 0.1-13.3 | - | - |
2 | 13 | 2S23,3S22,3S13 | 7 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | - | - |
1 | 13 | 3S23 | 8 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | - |
1 | 13 | Permit | 9 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 | 1.0-45.0 |
 | 15 | Error/Unclassified | - | - | - | - | - | - | - | - | - |
- Indicates not applicable
Trlr = Trailer
Table 41. Michigan Department of Transportation Classification and Weight Parameters for WIM
Class | Vehicle Description | No. of Axles | Spacing 1 (ft) | Spacing 2 (ft) | Spacing 3 (ft) | Spacing 4 (ft) | Spacing 5 (ft) | Spacing 6 (ft) | Spacing 7 (ft) | Spacing 8 (ft) | Spacing 9 (ft) | Spacing 10 (ft) | Weight Min-Max |
1 | Motorcycle | 2 | 0.1-6.0 | - | - | - | - | - | - | - | - | - | 100-3,000 |
2 | Car | 2 | 6.0-10.1 | - | - | - | - | - | - | - | - | - | 1,000-8,000 |
3 | Truck | 2 | 10.1-16.0 | - | - | - | - | - | - | - | - | - | 1,000-8,000 |
4 | Bus | 2 | 21.09-40.0 | - | - | - | - | - | - | - | - | - | 12,000 > |
5 | 2D | 2 | 8.0-21.09 | - | - | - | - | - | - | - | - | - | 8,000 > |
2 | Car/1 Axle Trailer | 3 | 6.0-10.1 | 6.0-30.0 | - | - | - | - | - | - | - | - | 1,000-12,000 |
3 | Truck/1 Axle Trailer | 3 | 10.1-16.0 | 6.0-30.0 | - | - | - | - | - | - | - | - | 1,000-15,000 |
4 | Bus | 3 | 21.09-40 | 3.0-7.0 | - | - | - | - | - | - | - | - | 20,000 > |
5 | 2D/1 Axle Trailer | 3 | 8.0-21.09 | 6.3-30.0 | - | - | - | - | - | - | - | - | 15,000-12,000 |
6 | 3 Axle Single Unit | 3 | 8.0-26.0 | 2.5-6.3 | - | - | - | - | - | - | - | - | 12,000 > |
8 | Semi 2-1 | 3 | 8.0-23.09 | 11.0-40.0 | - | - | - | - | - | - | - | - | 20,000 > |
2 | Car/2 Axle Trailer | 4 | 6.0-10.1 | 6.0-30.0 | 1.0-11.99 | - | - | - | - | - | - | - | 1,000-12,000 |
3 | Truck/2 Axle Trailer | 4 | 10.1-16.0 | 6.0-30.0 | 1.0-11.99 | - | - | - | - | - | - | - | 1,000-15,000 |
5 | 2D/2 Axle Trailer | 4 | 8.0-23.09 | 6.3-30.0 | 1.0-11.99 | - | - | - | - | - | - | - | 15,000-20,000 |
7 | 4 Axle Single Unit | 4 | 8.0-23.09 | 2.5-6.3 | 2.5-13.0 | - | - | - | - | - | - | - | 12,000 > |
8 | Semi 2-2 | 4 | 8.0-23.09 | 11.0-45.0 | 2.5-11.99 | - | - | - | - | - | - | - | 20,000 > |
8 | Semi 3-1 | 4 | 8.0-26.00 | 2.5-6.3 | 6.1-45.0 | - | - | - | - | - | - | - | 20,000 > |
3 | Truck/3 Axle Trailer | 5 | 10.1-16.0 | 6.0-30.0 | 1.0-11.99 | 1.0-11.99 | - | - | - | - | - | - | 1,000-15,000 |
7 | 5 Axle Single Unit | 5 | 8.0-23.09 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | - | - | - | - | - | 12,000 > |
9 | Semi 3-2 | 5 | 8.0-26.0 | 2.5-6.3 | 6.0-45.0 | 2.5-27.0 | - | - | - | - | - | - | 20,000 > |
9 | Semi 2-3 | 5 | 8.0-23.09 | 11.0-45.0 | 2.5-6.3 | 2.5-6.3 | - | - | - | - | - | - | 20,000 > |
11 | Semi 2-1-2 | 5 | 8.0-26.0 | 11.0-26.0 | 6.0-20.0 | 11.0-26.0 | - | - | - | - | - | - | 12,000 > |
10 | Semi 3-3 | 6 | 8.0-26.0 | 2.5-6.3 | 6.1-45.0 | 2.5-11.99 | 2.5-11.99 | - | - | - | - | - | 20,000 > |
10 | Semi 2-4 | 6 | 8.0-23.09 | 11.0-45.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | - | - | - | - | 20,000 > |
10 | Semi 4-2 | 6 | 8.0-26.0 | 2.5-6.3 | 2.5-6.3 | 6.1-46.0 | 2.5-11.99 | - | - | - | - | - | 20,000 > |
12 | Semi 3-1-2 | 6 | 8.0-26.0 | 2.5-6.3 | 11.0-26.0 | 6.0-24.0 | 11.0-26.0 | - | - | - | - | - | 12,000 > |
10 | Semi 3-4 | 7 | 8.0-26.0 | 2.5-6.3 | 10.0-20.0 | 6.0-12.0 | 6.0-12.0 | 6.0-12.0 | - | - | - | - | 20,000 > |
10 | Semi 3-4 | 7 | 8.0-26.0 | 2.5-6.3 | 3.5-45.0 | 2.5-12.0 | 2.5-6.3 | 2.5-6.3 | - | - | - | - | 20,000 > |
13 | Semi 3-*-* | 7 | 8.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | - | - | - | - | 20,000 > |
10 | Semi 3-5 | 8 | 8.0-26.0 | 2.5-6.3 | 3.5-45.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | - | - | 20,000 > |
10 | Semi 3-5 | 8 | 8.0-26.0 | 2.5-6.3 | 10.0-20.0 | 6.0-12.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | - | - | 20,000 > |
13 | Semi 3-*-* | 8 | 8.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | - | - | - | 20,000 > |
10 | Semi 3-6 | 9 | 8.0-26.0 | 2.5-6.3 | 3.5-45.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | - | 20,000 > |
10 | Semi 3-6 | 9 | 8.0-26.0 | 2.5-6.3 | 10.0-20.0 | 6.0-12.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | - | 20,000 > |
10 | Semi 4-5 | 9 | 8.0-26.0 | 2.5-6.3 | 2.5-6.3 | 6.3-15.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | - | 20,000> |
13 | Semi 3-*-* | 9 | 8.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | - | - | 20,000 > |
10 | Semi 3-7 | 10 | 8.0-26.0 | 2.5-6.3 | 3.5-45.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | 20,000 > |
10 | Semi 3-7 | 10 | 8.0-26.0 | 2.5-6.3 | 10.0-20.0 | 6.0-12.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | 20,000 > |
10 | Semi 4-6 | 10 | 8.0-26.0 | 2.5-6.3 | 2.5-6.3 | 6.3-15.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | 20,000> |
10 | Semi 5-5 | 10 | 8.0-26.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 6.3-15.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | - | 20,000> |
13 | Semi 3-*-* | 10 | 8.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | - | 20,000 > |
10 | Semi 3-8 | 11 | 8.0-26.0 | 2.5-6.3 | 3.5-45.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 20,000 > |
10 | Semi 3-8 | 11 | 8.0-26.0 | 2.5-6.3 | 10.0-20.0 | 6.0-12.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 20,000 > |
10 | Semi 5-6 | 11 | 8.0-26.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 6.3-15.0 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 2.5-6.3 | 20,000> |
13 | Semi 3-*-* | 11 | 8.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 3.0-45.0 | 20,000 > |
*Any number may be inserted here as long as the sum of the numbers substituted for the two asterisks (which can be different from each other) plus the leading value equals the total number of axles shown in the third column.
- Indicates not applicable
Min = Minimum
Max = Maximum
Table 42. Minnesota Classification Rule Set Rule Table (2006)
nRuleNum |
nAxleCount |
nClass |
1 to 2 Min |
1 to 2 Max |
2 to 3 Min |
2 to 3 Max |
3 to 4 Min |
3 to 4 Max |
4 to 5 Min |
4 to 5 Max |
5 to 6 Min |
5 to 6 Max |
6 to 7 Min |
6 to 7 Max |
7 to 8 Min |
7 to 8 Max |
8 to 9 Min |
8 to 9 Max |
9 to 10 Min |
9 to 10 Max |
10 to 11 Min |
10 to 11 Max |
11 to 12 Min |
11 to 12 Max |
1 |
2 |
1 |
12 |
90 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
2 |
2 |
91 |
121 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
3 |
2 |
3 |
121 |
163 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
4 |
2 |
5 |
163 |
288 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
5 |
2 |
4 |
288 |
481 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
6 |
3 |
6 |
121 |
266 |
24 |
72 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
7 |
3 |
1 |
12 |
90 |
12 |
96 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
8 |
3 |
2 |
91 |
121 |
36 |
241 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
9 |
3 |
5 |
163 |
288 |
72 |
245 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
10 |
3 |
3 |
121 |
163 |
72 |
265 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
11 |
3 |
8 |
108 |
289 |
264 |
481 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
12 |
3 |
4 |
288 |
481 |
36 |
481 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
13 |
4 |
7 |
72 |
266 |
12 |
72 |
12 |
97 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
14 |
4 |
2 |
12 |
121 |
72 |
241 |
12 |
241 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
16 |
4 |
3 |
121 |
163 |
72 |
301 |
12 |
241 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
17 |
4 |
8 |
132 |
164 |
12 |
72 |
12 |
481 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
18 |
4 |
8 |
132 |
164 |
241 |
481 |
40 |
97 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
19 |
4 |
4 |
121 |
289 |
12 |
72 |
97 |
241 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
20 |
4 |
4 |
156 |
266 |
72 |
361 |
12 |
241 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
21 |
4 |
4 |
288 |
481 |
24 |
481 |
12 |
481 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
22 |
5 |
3 |
72 |
163 |
72 |
301 |
12 |
36 |
12 |
36 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
23 |
5 |
4 |
72 |
266 |
12 |
72 |
72 |
133 |
36 |
97 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
24 |
5 |
7 |
72 |
234 |
12 |
72 |
36 |
72 |
36 |
97 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
25 |
5 |
7 |
121 |
266 |
12 |
72 |
12 |
97 |
97 |
241 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
26 |
5 |
9 |
72 |
234 |
72 |
481 |
36 |
97 |
36 |
97 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
27 |
5 |
9 |
72 |
301 |
36 |
72 |
133 |
541 |
36 |
181 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
28 |
5 |
11 |
72 |
234 |
181 |
301 |
72 |
241 |
181 |
301 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
29 |
6 |
4 |
72 |
266 |
12 |
72 |
12 |
301 |
96 |
301 |
12 |
241 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
30 |
6 |
4 |
121 |
266 |
24 |
61 |
97 |
219 |
24 |
61 |
24 |
61 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
31 |
6 |
7 |
72 |
266 |
12 |
72 |
12 |
97 |
12 |
97 |
12 |
97 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
32 |
6 |
10 |
72 |
301 |
36 |
73 |
218 |
481 |
36 |
181 |
36 |
97 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
33 |
6 |
12 |
96 |
481 |
12 |
97 |
96 |
541 |
12 |
97 |
97 |
481 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
34 |
7 |
7 |
72 |
234 |
12 |
72 |
12 |
97 |
12 |
97 |
12 |
97 |
12 |
97 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
35 |
7 |
10 |
72 |
301 |
36 |
73 |
96 |
541 |
36 |
181 |
36 |
97 |
36 |
97 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
36 |
7 |
13 |
96 |
481 |
12 |
97 |
96 |
481 |
12 |
97 |
96 |
481 |
97 |
481 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Note: The maximum (Max) and minimum (Min) ranges are all in units of inches.
Min = Minimum
Max = Maximum