ROH §15-19.35
Warning devices required when a vehicle breaks down on the road
Read the official text at honolulu.gov ↗When certain large vehicles break down on a road or its shoulder, the driver must put out warning devices to alert other drivers. The type of device depends on the time of day and what the vehicle carries. Flares or lanterns are used at night, and flags or reflectors may be used in the daytime.
The ordinance, as written (Honolulu County) — Display of warning devices when vehicle is disabled
A copy, taken August 22, 2026. The version published by Honolulu is the one that governs, and it may have changed since. Check it before relying on anything here.
(a) Whenever any motor truck, truck tractor, trailer, semi-trailer, or pole trailer is disabled upon the traveled portion of any highway or the shoulder thereof at any time when lighted lamps are required on the vehicles, the driver of such vehicle shall display the following warning devices upon the highway during the time the vehicle is so disabled on the highway, except as provided otherwise in subsection (b).
(1) A lighted fusee shall be immediately placed on the roadway at the traffic side of the motor vehicle, unless electric lanterns are displayed.
(2) Within the burning period of the fusee and as promptly as possible, three lighted flares (pot torches) or three electric lanterns shall be placed on the roadway as follows: one at a distance of approximately 100 feet in advance of the vehicle; one at a distance of approximately 100 feet to the rear of the vehicle; each in the center of the lane of traffic occupied by the disabled vehicle; and one at the traffic side of the vehicle approximately 10 feet rearward or forward thereof.
(b) Whenever any vehicle used in the transportation of flammable liquids in bulk or in the transportation of compressed flammable gases is disabled upon a highway at any time or place mentioned in subsection (a), the driver of such vehicle shall display upon the roadway the following lighted warning devices: one red electric lantern shall be immediately placed on the roadway at the traffic side of the vehicle, and two other red electric lanterns shall be placed to the front and rear, respectively, of the vehicle in the manner prescribed in subsection (a)(2).
When a vehicle of the type specified in this subsection is disabled, the use of flares, fusees, or any signal produced by flame as warning devices is prohibited.
(c) Whenever any vehicle of a type referred to in this section is disabled upon the traveled portion of a highway or the shoulder thereof, at any time when the display of fusees, flares, or electric lanterns is not required, the driver of such vehicle shall display two red flags upon the roadway in the lane of traffic occupied by the disabled vehicle, one at a distance of approximately 100 feet in advance of the vehicle, and one at a distance of approximately 100 feet to the rear of the vehicle.
(d) In the alternative, it is a compliance with this section in the event three portable reflector units on standards of a type approved by the chief of police are displayed at the times and under the conditions specified in this section either during the daytime or at nighttime; and such portable reflector units shall be placed on the roadway in the locations as described with reference to the placing of electric lanterns and lighted flares.
(e) The flares, fusees, lanterns, and flags to be displayed as required in this section shall conform with the requirements as hereinabove set forth.
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Published by the City and County of Honolulu through American Legal Publishing.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.