On cars sold in the US, the traditional rear turn signal was red, since it was tied in with the brake light. At some point, and I’m guessing in the 70s or perhaps 80s, cars began to be designed with a rear turn signal that was separate from the brake light.
On many cars, the separate turn signal is still red, and on others, it’s amber. I happen to think the amber signal is safer, since it’s less likely to be confused with the brake light, but I have no numbers to back that up.
My question is, why isn’t amber standard for rear turn signals (at least on cars sold in the US)? Is amber standard in other countries? Is it mixed like in the US? Why is it still mixed?
The crazy thing is you can’t pin it to any one manufacturer. Ford has amber signals on some models, but not on others. Same for Chrysler, Toyota, GM, etc. You can’t say it’s amber on foreign built (Canada, Mexico) and red on domestic built cars, because my Camry was built in Georgetown Kentucky, and it has amber turn signals.
I’m hoping for a factual answer, but mods, move where appropriate.
Thanks. I appreciate it. However, that article doesn’t really give the answer from a manufacturer’s POV, but I’m afraid your comment may be the closest we can come (unless/until we can hear from auto designers/engineers/corporate suits):