I have noticed on newer cars that when the directional (turn signal) is on, the headlight on the coinciding side goes off. What is the benefit, if any, of this function?

1.33K views

I have noticed on newer cars that when the directional (turn signal) is on, the headlight on the coinciding side goes off. What is the benefit, if any, of this function?

In: Technology

Turning off the bright headlight may make it easier to notice the turn signal, especially when it is otherwise dark out. I.e., If someone shines a bright light in your eyes, you may not notice any other lights near the light source.

It’s contrast. The turn signal contrasted on a darker background makes it appear brighter and more noticeable to other drivers.

A lot are already answering. I also believe there are federal regulations for how close a blinker can be to a headlight. Turning the headlight off allows designs where the two are close to pass this regulation.

Like you said, to get your attention. Btw, thats only day time running lights. Shouldnt do that during night unless they are on auto and the light sensor is broken.