Automation Vehicle Identification


Colorado uses an automated vehicle identification clearance system designed to make clearing the state's ports more convenient. When your vehicle is weighed at one of Colorado's facilities a port officer will attempt to obtain the vehicle specific information by inserting the Vehicle Identification Number (VIN) into the automated system as the truck is being weighed.

When the vehicle's information is accessible and vehicle has been weighed with no weight or safety concerns, the driver will be allowed to proceed. When the vehicle's information is not accessible, the driver will be required to weigh, park, and present all valid paperwork to the port officer.


Option 1: Vehicle Identification Number (VIN)

  • Affix company name or logo to both sides of the power unit.
  • Clearly mark the last eight characters of the Vehicle Identification Number (VIN) on the passenger side of the cab.
  • Use contrasting color with that of the vehicle.
  • The characters need to be at least 2 inches in height, and clearly visible from a distance of at least 50 feet

Option 2: Alpha Identifier

  • A departmentally issued alpha identifier combined with the unit number may be displayed in lieu of the Vehicle Identification Number (VIN). This number shall be located on the passenger side of the vehicle and comply with the same requirements previously described.

Option 3:  USDOT Number

  • The USDOT Number and Unit Number sub-points should be that they are clearly legible from 50 feet and are in contrasting color to the cab. The USDOT Number should be placed somewhere in conjunction with their carrier name.

Option 4:  Plate

The Plate sub-points should be that the plate is attached to the front of the vehicle (back for any non-combination units), and should be kept clean and free of obstructions.