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

Section § 393.87: Warning flags on projecting loads.

Guidance Q&A

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.

Regulatory Topic: Triangular flag to mark oversized load
Effective Date: Sunday, May 4, 1997
Issued Date: Friday, April 4, 1997