Idaho § 49-921 - Rear mounted acceleration and deceleration lighting system
Full text of Idaho Idaho Statutes § 49-921 — Rear mounted acceleration and deceleration lighting system, with citation guidance and answers to common questions.
§ 49-921. Rear mounted acceleration and deceleration lighting system
(1) Every motor vehicle, trailer, semitrailer, truck tractor, and pole trailer used in the state may be equipped with an auxiliary lighting system consisting of:
(a) One (1) green light to be activated when the accelerator of the motor vehicle is depressed;
(b) Not more than two (2) amber lights to be activated when the motor vehicle is moving forward, or standing and idling, but is not under the power of the engine.
(2) An auxiliary system shall not interfere with the operation of vehicle tail lamps and shall not interfere with the operation of vehicle signal lamps and signal devices. The system may operate in conjunction with tail lamps or signal lamps and signal devices.
(3) Only one (1) color of the system may be illuminated at any one (1) time, and at all times either the green light, or amber light or lights shall be illuminated when the tail lamps of the vehicle are not illuminated.
(4) The green light and the amber light or lights, when illuminated, shall be plainly visible at a distance of five hundred (500) feet to the rear.
(5) Only one (1) system may be mounted on a motor vehicle, trailer, semitrailer, truck tractor, or pole trailer; and the system shall be rear mounted in a horizontal fashion, at a height of not more than seventy-two (72) inches, nor less than twenty (20) inches.
(6) On a combination of vehicles, only the lights of the rearmost vehicle need actually be seen and distinguished as provided in subsection (4) of this section.
(7) Each manufacturer’s model of such a system described in this section shall be approved by the board before it may be sold or offered for sale in the state.
[49-921, added 1988, ch. 265, sec. 247, p. 699.]
Source: official Idaho text · Last verified 2026-08-27
Frequently Asked Questions About Idaho § 49-921
What does Idaho Statutes § 49-921 cover?
Section 49-921 ("Rear mounted acceleration and deceleration lighting system") is part of the Idaho Statutes, the codified statutory law of Idaho. It sets out the legal rule or procedure described in the text above. Statutes are amended regularly, so always verify against the official source.
How do I cite Idaho § 49-921?
A common citation format is "Idaho Statutes § 49-921" (Idaho). Legal writing may require the code abbreviation, section number, and year or edition. Match the style required by your court, professor, or publisher.
Is this the official text of Idaho law?
No. This page is for research and education and may not include the most recent amendments. For official current law, check the Idaho official source linked on this page or consult a licensed Idaho attorney.
How does Idaho § 49-921 apply to my situation?
Statutes are interpreted in context, and application depends on your specific facts. Only a licensed attorney in Idaho can advise on how this section applies to you. Contact your state or local bar association for a referral.
Sources & Verification
Not legal advice. Verify against the official source and consult a licensed attorney in Idaho.