Collisions occur when the space required to execute a maneuver is what in relation to available clear space?

The correct response highlights that collisions occur when the space required to execute a maneuver is less than the available clear space. This situation suggests that a driver misjudges their spatial requirements, leading to unsafe driving conditions. In scenarios where the driver believes they have enough room to maneuver but in reality, they do not, a collision is likely to occur.

For safe driving, understanding the relationship between the space needed for a turn, lane change, or stop, and the actual available space is critical. Adequate clear space ensures a driver can execute these maneuvers safely without encroaching on areas occupied by other vehicles or obstacles. Therefore, always making cautious estimations regarding space is fundamental to prevent accidents.