Final answer:
The DDC Collision Prevention Formula is a defensive driving guideline that emphasizes the significance of calculating stopping distances, which include reaction and braking distances, to prevent collisions.
Step-by-step explanation:
The DDC Collision Prevention Formula is a set of guidelines for defensive driving meant to prevent collisions and promote safe driving habits. Critical to this formula is the understanding of stopping distances, which include the reaction time distance and the braking distance. During the reaction time, it's assumed that a vehicle will continue to travel at a constant velocity before the brakes are applied. Then, the stopping distance is calculated by adding the distance covered during the driver's reaction time to the distance it takes for the car to come to a complete stop after braking has commenced.
For example, if the velocity of the car just before impact is considered and the duration of the collision, it's crucial to understand how these factors contribute to the total stopping distance. Additionally, to ensure safety when crossing the road, it is necessary to maintain a sufficient safety distance, measured in car-lengths, from oncoming vehicles.