So with old cars, the brake lights have a nice fade in to them, similar thing happens to indicators. I know this is a really petty request, but I feel like it could add quite a lot of immersion to the game.
Games like Midnight Club LA done a good job of that and I think, even if it´s a small thing, adding a small "animation" to the turning on and off of the lights would be smth nice
I was about to make a post about this. Having a little bit of a "ramp" in intensity would make a HUGE difference in realism, even though it's so subtle. Newer cars (i.e. ETKs, SBR4) could have an instant on/off instead because they (probably) have LED lighting.