Length:
- Over 85′ on some portions of two and four-lane highways – one escort
- Over 110′ on two-lane or over 115′ on four or more lanes – one escort
Overhang: Over 25′ – one escort.
Width:
Interstate over 13′ – one rear escort or one flashing yellow light in rear.
The following requirements apply to most routes (“Green Routes”); some smaller routes may require more:
Two-lane highways:
Width:
- over 13′ – one escort or one flashing yellow light in rear.
- over 15′ – two escorts
- or 1 front escort and flashing yellow light in rear.
Four-lane highways:
Width:
- over 13′ – one rear escort or one flashing yellow light in rear
- over 15′ – two escorts, or front escort and flashing yellow light in rear
Height:
- Over 16′ – one escort with high pole
- Over 17′-6″ – route survey and utility clearance letters also required
Note: All pilot car vehicles must be over 60″ wide for CO.
MISCELLANEOUS: Dozer blade can be detached and hauled with the dozer on same trailer if the load would be overweight with or without the blade. Colorado Chain Law: All commercial vehicle truck-tractors operating on I-70 between Dotsero (milepost 133) and Morrison (milepost 259) between September 1st to May 31st must carry sufficient chains to be in compliance with the Colorado chain law. You can be fined for failure to comply. A permit is now available for overweight divisible loads on tractor/trailers with tandem, tridem or quad trailer.
SIGNS, FLAGS & LIGHTS: “Oversize Load” signs are required front and rear for all oversize loads. They are not required and should not be used for overweight only loads. Flags are required at all four corners of any extremities for wide and over length loads, and at the end of load projections greater than 4 feet.
For night travel of wide loads, a flashing yellow light mounted on front of the vehicle and two or three mounted to the extreme rear are required. Over length or with rear overhang (over 10′) may run at night with a flashing yellow light mounted to front of vehicle and from one to three cluster lights mounted to overhang (red for rear overhang, yellow for front overhang). For night travel with legal overhang (10′ rear or less) but greater than 4′ rear, a red light or lantern plainly visible for 500 feet is required at the end of load projection.
