You are driving on the highway and overtaking a large truck. As soon as you pass it, you suddenly see a brief flash of light in your mirror. You might immediately think the driver is angry or that you are driving too slowly and need to move to the right quickly. However, such a brief light signal after overtaking can have a completely different meaning. In some situations, the truck driver may simply be trying to help you.
Truck drivers use various informal signals on the road. They can send each other short messages using their headlights and turn signals. A single short flash of light after an overtaking maneuver can be used to indicate that the overtaking vehicle has cleared the truck. Below, you can read what this signal may mean and why truck drivers sometimes use it.
Why Truck Drivers Do This
A truck with a semi-trailer can
