The absence of a requirement for amber rear turn signals in the United States and Canada sets these countries apart globally. This lack of necessity appears to stem from governmental inaction rather than a valid rationale. The resulting inconsistency extends across different vehicle models within the automotive market. A detailed analysis of turn signal color choices for mainstream vehicles has been documented in a Medium article by Jack Tigras.
Tigras’ research encompasses 249 2023 models, excluding smaller manufacturers like McLaren and Ferrari. While some automakers stick solely to amber rear signals and others use alternative colors, many have adopted a varied approach based on nameplates and trims. For instance, Volkswagen made the switch from amber to red rear lights for the latest Jetta generation about three years ago, as highlighted by Tigras. Conversely, Ford opted for amber signals as a distinguishing feature for upscale F-150 builds. While base pickups feature red flashing lights, premium versions like the Platinum showcase amber ones—particularly in LED form.
Table of automakers that use red and amber turn signals in U.S. models. Jack Tigras
Out of the 249 models included in the study, 121 displayed different color rear signals, representing approximately 48% of new vehicles in the previous year. However, this isn’t merely an issue of visual appeal. Research from NHTSA indicates that amber turn signals can reduce crash occurrences by more than five percent in specific driving circumstances, particularly when only a portion of a vehicle’s taillights is visible—such as during turns, lane changes, or when exiting parking spots. Amber signals also help in situations where a brake light malfunctions, hazard lights are activated, or a driver taps their brakes intermittently. In contrast, red signals introduce ambiguity, leading to increased crash probabilities.
If red signals are considered inferior, why are they still utilized? One speculated reason is cost-effectiveness, as using fewer light colors could potentially cut costs for car manufacturers. However, some models implementing red signals in the U.S. feature amber signals in other markets, indicating that manufacturing complexity adds expenses, making cost savings unlikely. It is plausible that automotive brands simply prefer the appearance of red turn signals for uniformity, even if they do not serve their intended purpose as well. As long as regulations stay unchanged, the use of turn signals will continue to vary across this side of the globe.
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