Increase your following distance when driving behind a large vehicle:

Question

Drivers of trucks, buses, vans, and any vehicles pulling campers or trailers may not be able to see you if you are driving directly behind them. Increase your following distance when driving behind one of these vehicles. Additionally, large vehicles can block your view of the road, so increase your following distance to look around the sides of the vehicle and see the road ahead.

Accepted Answer

To better see around the sides of the vehicle.

Answer

Because other drivers tend to pull behind large vehicles before trying to pass them.

Answer

Because following too closely will get you caught in the vehicle's slipstream.