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PURPLE OVERWEIGHT CHART


Maximum Allowable Weight Distribution for Annual Overweight
Permits on PURPLE coded routes of the Route Capacity Map.
Higher axle weight limits for tandem, tridem and quad axles may be allowed if the axle spacing’s are larger.
See chart on next page for axle spacing’s and the allowed weight.
This page in Printable Format (pdf)


Single Axle
30,000
Tandem Axle
51,500
Tridem Axle
64,500


Tire
Width
Single Axle,
Single Tires
Tandem Axle
Single Tires
8.25
13,200
26,400
9.00
14,400
28,800
10.00
16,000
32,000
11.00
17,600
35,200
12.00
19,200
38,400
13.00
20,800
41,600
14.00
22,400
44,800
15.00
24,000
48,000
16.00
25,600
51,200
17.00
27,200
51,500
18.00
28,800
51,500
19.00+
30,000
51,500

Maximum allowable weight is based on the distance in feet between the first and last axle of any group or groups of consecutive axles.

To find the weight allowed for the vehicle combination, use the number of axles and axle spacings from the number 2 axle to the last axle of the combination, add the weight for the steering axle (approximately 12,000 lbs) to this weight, to acquire the Total Gross Weight Allowed.

To find the weight allowed for self propelled vehicles, use the number of axles and axle spacings from the number 1 axle to the last axle of the combination. If axles have less than 4 tires per axle, see chart above for weights allowed.

Check the weight allowed for every internal group or groups of axles as well as total Gross Weight. At times the sum of the axle weights may be less than the Total Gross Weight Allowed. Must use most restrictive weights.

If the vehicle combination exceeds the weight allowed on any group or groups of axles, or Total Gross Weight Allowed by this chart and the route capacity map, the vehicle must operate on a single trip permit if approved.



Axle Space
in Feet
2
Axles
3
Axles
4
Axles
5
Axles
6
Axles
7
Axles
8
Axles
9
Axles
10
Axles
11
Axles
12
Axles

4
51,500










5
53,000










6
54,500










7
56,000










8
57,500
63,500









9
59,000
64,500









10
60,500
65,500









11
60,500
67,000









12
60,500
68,000
75,500








13
60,500
69,000
76,500








14
60,500
70,000
77,500








15
60,500
71,500
78,500








16
60,500
72,500
79,500
87,500







17
60,500
73,500
80,500
88,500







18
60,500
74,500
81,500
89,500







19
60,500
76,000
82,500
90,500







20
60,500
77,000
83,500
91,500
99,500






21
60,500
78,000
84,500
92,500
100,500






22
60,500
79,500
85,500
93,000
101,500






23
60,500
80,500
86,500
94,000
102,500






24
60,500
81,500
87,500
95,000
103,500
111,500





25
60,500
82,500
88,500
96,000
104,000
112,500





26
60,500
84,000
89,500
97,000
105,000
113,500





27
60,500
85,000
90,500
98,000
106,000
114,500





28
60,500
86,000
91,500
99,000
107,000
115,500
124,000




29
60,500
87,000
92,500
100,000
108,000
116,000
124,500




30
60,500
88,500
93,500
101,000
108,500
117,000
125,500




31
60,500
89,500
94,500
101,500
109,500
118,000
126,500




32
60,500
90,500
95,500
102,500
110,500
119,000
127,500
136,000



33
60,500
91,500
96,500
103,500
111,500
119,500
128,000
136,500



34
60,500
91,500
97,500
104,500
112,500
120,500
129,000
137,500



35
60,500
91,500
98,500
105,500
113,500
121,500
130,000
138,500



36
60,500
91,500
99,500
106,500
114,000
122,500
130,500
139,500
148,000


37
60,500
91,500
100,500
107,500
115,000
123,000
131,500
140,000
149,000


38
60,500
91,500
101,500
108,500
116,000
124,000
132,500
141,000
149,500


39
60,500
91,500
102,500
109,500
117,000
125,000
133,500
142,000
150,500


40
60,500
91,500
103,500
110,000
118,000
126,000
134,000
142,500
151,500
160,000

41
60,500
91,500
104,500
111,000
118,500
126,500
135,000
143,500
152,000
161,000

42
60,500
91,500
105,500
112,000
119,500
127,500
136,000
144,500
153,000
161,500

43
60,500
91,500
106,500
113,000
120,500
128,500
137,000
145,000
154,000
162,500

44
60,500
91,500
107,500
114,000
121,500
129,500
137,500
146,000
154,500
163,500
172,000
45
60,500
91,500
108,500
115,000
122,500
130,000
138,500
147,000
155,500
164,000
173,000
46
60,500
91,500
109,500
116,000
123,000
131,000
139,500
148,000
156,500
165,000
174,000
47
60,500
91,500
110,500
117,000
124,000
132,000
140,000
148,500
157,000
166,000
174,500
48
60,500
91,500
111,500
118,000
125,000
133,000
141,000
149,500
158,000
166,500
175,500
49
60,500
91,500
112,500
118,500
126,000
134,000
142,000
150,500
159,000
167,500
176,500
50
60,500
91,500
114,000
119,500
127,000
134,500
143,000
151,000
159,500
168,500
177,000
51
60,500
91,500
115,000
120,500
127,500
135,500
143,500
152,000
160,500
169,000
178,000
52
60,500
91,500
116,000
121,500
128,500
136,500
144,500
153,000
161,500
170,000
178,500
53
60,500
91,500
117,000
122,500
129,500
137,500
145,500
153,500
162,000
171,000
179,500
54
60,500
91,500
118,000
123,500
130,500
138,000
146,500
154,500
163,000
171,500
180,500
55
60,500
91,500
119,000
124,500
131,500
139,000
147,000
155,500
164,000
172,500
181,000
56
60,500
91,500
120,000
125,500
132,500
140,000
148,000
156,500
165,000
173,500
182,000
57
60,500
91,500
121,000
126,500
133,000
141,000
149,000
157,000
165,500
174,000
183,000
58
60,500
91,500
121,000
127,000
134,000
141,500
149,500
158,000
166,500
175,000
183,500
59
60,500
91,500
121,000
128,000
135,000
142,500
150,500
159,000
167,500
176,000
184,500
60
60,500
91,500
121,000
129,000
136,000
143,500
151,500
159,500
168,000
176,500
185,500
61
60,500
91,500
121,000
130,000
137,000
144,500
152,500
160,500
169,000
177,500
186,000
62
60,500
91,500
121,000
131,000
137,500
145,000
153,000
161,500
170,000
178,500
187,000
63
60,500
91,500
121,000
132,000
138,500
146,000
154,000
162,000
170,500
179,000
188,000
64
60,500
91,500
121,000
133,000
139,500
147,000
155,000
163,000
171,500
180,000
188,500
65
60,500
91,500
121,000
134,000
140,500
148,000
155,500
164,000
172,500
181,000
189,500
66
60,500
91,500
121,000
135,000
141,500
148,500
156,500
165,000
173,000
181,500
190,500
67
60,500
91,500
121,000
135,500
142,000
149,500
157,500
165,500
174,000
182,500
191,000
68
60,500
91,500
121,000
136,500
143,000
150,500
158,500
166,500
175,000
183,500
192,000
69
60,500
91,500
121,000
137,500
144,000
151,500
159,000
167,500
175,500
184,000
192,500
70
60,500
91,500
121,000
138,500
145,000
152,500
160,000
168,000
176,500
185,000
193,500
71
60,500
91,500
121,000
139,500
146,000
153,000
161,000
169,000
177,500
186,000
194,500
72
60,500
91,500
121,000
140,500
147,000
154,000
162,000
170,000
178,000
186,500
195,000
73
60,500
91,500
121,000
141,500
147,500
155,000
162,500
170,500
179,000
187,500
196,000
74
60,500
91,500
121,000
142,500
148,500
156,000
163,500
171,500
180,000
188,500
197,000
75
60,500
91,500
121,000
143,500
149,500
156,500
164,500
172,500
180,500
189,000
197,500
76
60,500
91,500
121,000
144,000
150,500
157,500
165,000
173,500
181,500
190,000
198,500
77
60,500
91,500
121,000
145,000
151,500
158,500
166,000
174,000
182,500
191,000
199,500
78
60,500
91,500
121,000
146,000
152,000
159,500
167,000
175,000
183,000
191,500
200,000
79
60,500
91,500
121,000
147,000
153,000
160,000
168,000
176,000
184,000
192,500
200,000
80
60,500
91,500
121,000
148,000
154,000
161,000
168,500
176,500
185,000
193,500
200,000
81
60,500
91,500
121,000
149,000
155,000
162,000
169,500
177,500
185,500
194,000
200,000
82
60,500
91,500
121,000
150,000
156,000
163,000
170,500
178,500
186,500
195,000
200,000
83
60,500
91,500
121,000
151,000
156,500
163,500
171,500
179,000
187,500
196,000
200,000
84
60,500
91,500
121,000
151,000
157,500
164,500
172,000
180,000
188,000
196,500
200,000
85
60,500
91,500
121,000
151,000
158,500
165,500
173,000
181,000
189,000
197,500
200,000
86
60,500
91,500
121,000
151,000
159,500
166,500
174,000
182,000
190,000
198,500
200,000
87
60,500
91,500
121,000
151,000
160,500
167,000
174,500
182,500
191,000
199,000
200,000
88
60,500
91,500
121,000
151,000
161,500
168,000
175,500
183,500
191,500
200,000
200,000
89
60,500
91,500
121,000
151,000
162,000
169,000
176,500
184,500
192,500
200,000
200,000
90
60,500
91,500
121,000
151,000
163,000
170,000
177,500
185,000
193,500
200,000
200,000
91
60,500
91,500
121,000
151,000
164,000
171,000
178,000
186,000
194,000
200,000
200,000
92
60,500
91,500
121,000
151,000
165,000
171,500
179,000
187,000
195,000
200,000
200,000
93
60,500
91,500
121,000
151,000
166,000
172,500
180,000
187,500
196,000
200,000
200,000
94
60,500
91,500
121,000
151,000
166,500
173,500
181,000
188,500
196,500
200,000
200,000
95
60,500
91,500
121,000
151,000
167,500
174,500
181,500
189,500
197,500
200,000
200,000
96
60,500
91,500
121,000
151,000
168,500
175,000
182,500
190,500
198,500
200,000
200,000
97
60,500
91,500
121,000
151,000
169,500
176,000
183,500
191,000
199,000
200,000
200,000
98
60,500
91,500
121,000
151,000
170,500
177,000
184,000
192,000
200,000
200,000
200,000
99
60,500
91,500
121,000
151,000
171,000
178,000
185,000
193,000
200,000
200,000
200,000
100
60,500
91,500
121,000
151,000
172,000
178,500
186,000
193,500
200,000
200,000
200,000
101
60,500
91,500
121,000
151,000
173,000
179,500
187,000
194,500
200,000
200,000
200,000
102
60,500
91,500
121,000
151,000
174,000
180,500
187,500
195,500
200,000
200,000
200,000
103
60,500
91,500
121,000
151,000
175,000
181,500
188,500
196,000
200,000
200,000
200,000
104
60,500
91,500
121,000
151,000
176,000
182,000
189,500
197,000
200,000
200,000
200,000
105
60,500
91,500
121,000
151,000
176,500
183,000
190,500
198,000
200,000
200,000
200,000
Page Last Modified: 12/16/2013 2:24:55 PM

Division of Motor Vehicles / Commercial Vehicle Services
Ports of Entry- (208) 334-8688
Motor Carrier- (208) 334-8611
Overlegal Permits- (208) 334-8420
or 1-800-662-7133

CVS@itd.idaho.gov

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Idaho Transportation Department
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