Final answer:
Maximum negative acceleration is the rate at which the speed of a car can decrease to avoid a collision. It is used in collision avoidance to determine the minimum acceleration required to avoid exceeding the speed limit or colliding with an object.
Step-by-step explanation:
In the context of collision avoidance, maximum negative acceleration refers to the maximum rate at which the speed of the car can decrease to avoid a collision. When a motorist sees a deer in the road, they need to decelerate or brake to avoid hitting the deer. The concept of maximum negative acceleration is used to determine the minimum acceleration the car must have to avoid exceeding the speed limit or colliding with an object in its path.