(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.
lawyer at desk

Ask a traffic law question, get an answer ASAP!
Thousands of highly rated, verified traffic lawyers.
Parking violations, accidents, DUI/DWI, licensing, registration, and more
Protect your vehicle and your rights with expert legal help now
Click here to chat with a lawyer about your rights.

Terms Used In Idaho Code 49-921

  • State: when applied to the different parts of the United States, includes the District of Columbia and the territories; and the words "United States" may include the District of Columbia and territories. See Idaho Code 73-114
(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.