Question

to let someone know you are going to slow down to let someone know you are going down to let someone know you are going to slow down to let someone know you are going down how can you tell if the driver of a large truck can see you? if you can see the driver in their side mirror if you can see the license plate if you have your headlights on if you are also in a truck

Explanation:

If you can see the driver in their side - mirror, it means they can likely see you too, which is a way to tell if a large - truck driver can see you.

Answer:

If you can see the driver in their side mirror