We’ll start with a pop quiz: A police officer sees that the right brake light of a vehicle fails to illuminate when the driver applies brakes while driving down a street in North Carolina. The left brake light works. Does the officer’s observation of the malfunctioning right brake light provide reasonable suspicion that a violation of the state’s traffic laws has occurred, thus justifying a stop of the vehicle? Yes. A stop of the vehicle based on this observation is constitutional. No. A stop of the vehicle based on this observation is unconstitutional. So as not to spoil the surprise, the answer appears after a page break. First, some background. G.S. 20-129(g) sets forth the requirements for brake lights—termed “stop lamps” under the statute—on vehicles operated on North Carolina roads. Any motor vehicle, motorcycle, or motor-driven cycle manufactured after December 31, 1955 that is operated on street or highway in North Carolina must be “equipped with a stop lamp on the rear of the vehicle.” The stop lamp must display a red or amber light visible from at least 100 feet to the rear in normal sunlight. It may be incorporated into a unit with one or more other rear lamps. Other provisions of G.S. 20-129 set forth the requirements for lighted “rear lamps” for vehicles. G.S. 20-129(d) requires that every motor vehicle, and every trailer or semitrailer attached to a motor vehicle and every vehicle drawn at the end of a combination of vehicles must “have all originally equipped rear [...]
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