Colorado Oversize Load Signs, Flags And Lights

What Are Colorado’s Two Warning-Sign Formats?

Rule 405.7 in 2 CCR 601-4 provides a 5-foot by 10-inch sign with 8-inch black letters and a 1-inch stroke, or a 7-foot by 18-inch sign with 10-inch black letters and a 1.41-inch stroke. Both use yellow. Messages may identify Wide, Long or Oversize, with or without Load, as applicable, visible from front and rear.

Choose the format as a complete set of measurements. Mixing the smaller panel’s lettering with the larger panel’s specification is not the same as following either option. Check visibility from approaching traffic after attaching any front overhang equipment.

Does An Overweight-Only Truck Need That Sign?

Rule 405.7 expressly excludes overweight-only vehicles and Longer Vehicle Combinations; Chapter 7 includes the corresponding exceptions. Specialized permits can have other conditions.

Keep that exception narrow. The absence of extra width does not prove the combination is legal length or height. Check the complete loaded dimensions and identify whether the paperwork is actually an LVC authorization rather than an ordinary oversize movement permit.

Which Night-Lighting Differences Does CDOT Highlight?

CDOT’s rule page says an overwidth movement above 8 feet 6 inches and up to 12 feet needs a front flashing yellow light and two or three at the extreme rear for night travel. It also describes different front/rear overhang cluster-light colors and a separate restriction above 14 feet wide unless specially authorized.

Do not use a daylight checklist after a delayed loading appointment without a new review. Establish the permitted travel window first, then build a lighting layout for the approved movement. Adding rear lamps cannot erase a night restriction.

Where Is The Rest Of Colorado’s Equipment Decision?

The linked rulebook, restriction map and issued permit must be used together. This article’s verified numeric examples concern signs and selected nighttime lights; they are not a complete flag-placement chart.

Create a second list for flags, overhangs and escort equipment rather than leaving those fields blank on a sign-only checklist. Ask the permit authority about any unresolved configuration. Do not interpret a focused source summary as evidence that a flag or escort device is unnecessary.

How Can RouteAll Help With This Movement?

In RouteAll, check the extracted Colorado road sequence against the issued permit before briefing the crew. Keep the permit category and approved travel window visible in the trip records. RouteAll is not an equipment inspector and does not decide which sign exception or night-light provision authorizes the movement. Get RouteAll For Permit Route Review.

Before You Roll

Identify the extra-legal feature, select one complete sign format and confirm the actual permit category. Complete the unresolved flag/escort checks from current sources. If travel may extend into darkness, resolve authorization and the correct light layout before dispatch.