I've been thinking, I am positive that everybody knows that when you turn on the headlights, that running light esque lights appear on the tail lights. What I was thinking is, maybe there could be just normal running lights for the headlights when they are not in use? I have posted an example below.
There are running lights on a few cars in the game already, such as the ETK 800 Series, as well as the ETK K Series, and the Hirochi SBR4.