Because of their size, trucks and buses often need to move _________ to make right turns.

Explanation

When making sharp turns, large vehicles such as trucks and buses sometimes need more than one lane to complete the turn. When turning right, these drivers may move into the left lane so they can make the right turn without running over the curb or hitting an object on it. If you try to squeeze between the truck and the right curb, you will risk a collision.