['CMV Parts and Maintenance']

['Warning devices']

03/24/2026

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Topic Search
CMV Parts and Maintenance - Warning devices

§393.87 Flags on projecting loads

RegSense Fleet Safety Federal Motor Carrier Safety Administration (FMCSA), DOT CMV Parts and Maintenance Warning devices Focus Area Compliance Docs Standard Interpretation English Transportation USA

Question 1: May a triangular-shaped flag or device be used by itself to mark an oversized load?

Guidance: No. However, nothing prohibits using a triangular-shaped flag in conjunction with the prescribed flag.

['CMV Parts and Maintenance']

['Warning devices']

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