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State Info

Size/Weight limits - Colorado

RegSenseSizes and weightsState InfoColoradoBest ResultsFocus AreaFleet OperationsEnglishSize and Weight LimitsTransportation
Dimension National Network State and Other Supplemental Highways
Width: 8' 6"8' 6"
Height: 14' 6"
Unless otherwise restricted		14' 6"
Unless otherwise restricted
Length: National Network State and Other Supplemental Highways
Straight Trucks45'45'
Straight truck and trailer70'70'
Tractor-semitrailer combinationsNo limit
if trailer is 57' 4" or less		No limit
if trailer is 57' 4" or less
Semitrailer57' 4"57' 4"
Tractor-twin-trailer combinationNo limit
if trailers are 28' 6" or less
No limit
if trailers are 28' 6" or less
Trailers of twin-trailer combinations28' 6"28' 6"
Stinger-steered boat-transporter80'80'
Overhang limitations4' front, 6' rear4' front, 6' rear
Stinger-steered auto-transporter80'80'
Overhang limitations4' front, 6' rear4' front, 6' rear
Saddlemount97'97' up to 4
General overhang limitations4' front, 10' rear4' front, 10' rear
Drawbar15'15'
Weight:  Interstate and Defense Highways State and Other Supplemental Highways
Steer axle18,000
Due to limit of single pneumatic tire wheels		18,000
Due to limit of single pneumatic tire wheels
Single axle20,000 20,000
21,000 lb if the vehicle or combination is a digger derrick or bucket boom truck operated by an electric utility.
Tandem axle36,000 40,000
Gross vehicle weight80,000 85,000
Per wheel9,000
On single pneumatic tires		9,000
On single pneumatic tires
APU allowance550550
Natural gas allowance2,000
Includes other alternative fuel vehicles		2,000
Includes other alternative fuel vehicles

Bridge rules — Interstate Highways

GROSS WEIGHT FORMULA: The maximum weight of any vehicle or combination of vehicles may not exceed that which is determined by the formula:



up to a maximum of 80,000 pounds, where W equals the overall gross weight on any group of two or more consecutive axles to the nearest 500 lb, L is the distance in feet between the extremes of any group of two or more consecutive axles, and N equals the number of axles in the group under consideration.

Where a combination of vehicles is used, a vehicle must not carry a gross weight of less than 10% of the overall gross weight of the combination.

State Highways

Formula: the maximum weight of any combination of vehicles (tractor-trailer) may not exceed that which is determined by the formula:

W = 1000 (L + 40)

where W is the gross weight in pounds and L is the length in feet between the centers of the first and last axles of such vehicle or combination of vehicles; gross weight must not exceed 85,000 pounds.

Where a combination of vehicles is used, a vehicle must not carry a gross weight of less than 10% of the overall gross weight of the combination.

All partial numbers arrived at during computations were rounded to the next higher whole number prior to proceeding to the next step of the equation.

View agency contact information

['Size and Weight Limits']
['Sizes and weights']
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