Because of their size, double and triples:

Question

The driver of a double or triple combination must be especially conscious of the space surrounding their vehicle. Doubles and triples need more room to turn and stop than other smaller vehicles.

Accepted Answer

Need more room to stop than smaller vehicles.

Answer

Stop quickly.

Answer

Can accelerate quickly.

Answer

Are easier to maneuver on steep downgrades than smaller vehicles.

Because of their size, double and triples:

Wait, before you go