There are studies linked below that demonstrate a tangible safety benefit of amber turn signals. You might want to check them out. Though it might be small, the benefit is demonstrably there.
This has always bugged me, and no one talks about it. Our automotive lighting regulations in North America are stupid when it comes to tail lights. This video is about what is stupid, why it’s stupid, and what we could do about it.
Here are some studies showing that amber turn signals are indeed safer:
The following NHTSA study found between a 3 and 28% decrease in liklihood of collision with amber turn signals, although it acknowledges that some of this may have been related to simply having a separate indicator for braking and turning and not explicitly the color;
This study showed a significant descrease in reaction time to a brake signal when the vehicle is fitted with amber turn signals--partially explained by “Specifically, the subjects knew whether the red or the yellow turn signals were to be expected”. This suggests that the design should make clear even when the lights aren’t lit that there is a separate indicator for a turn signal.
And wouldn’t ya know it, the IIHS has done some research. It’s a shame they aren’t making a bigger fuss about this:
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