HCC §24-158
Slow vehicles must show a special orange triangle
Read the official text at hawaiicounty.gov ↗This rule says that any slow-moving vehicle, like road construction equipment, that goes 25 mph or less must have a special orange triangle on its back when on a public road. The triangle must be mounted a certain way and height. It is in addition to any required lights.
contractorslandowners
The ordinance, as written (Hawaiʻi County) — Slow moving vehicles; emblems required
A copy, taken August 21, 2026. The version published by Hawaiʻi County is the one that governs, and it may have changed since. Check it before relying on anything here.
(a) All machinery including all road construction machinery except when guarded by flagmen or flares, designed to operate at twenty-five mph or less, hereinafter referred to as slow moving vehicles, travelling on a public highway where permitted by law during day or night, shall display a triangular slow moving vehicle emblem on the rear of the vehicle. Registered or legal owners of such vehicles shall use emblems, as developed by the American Society of Agricultural Engineers and printed in ASAE Standard; ASAE S276.1, for the purpose of identifying slow moving vehicles. The emblem shall be mounted on the rear of the vehicle, base down, and at a height of not less than two feet nor more than six feet from ground to base. (b) The display or use of such emblem as required by this section shall be in addition to any lighting devices required by law.
Published by the County of Hawaiʻi Office of the County Clerk.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.