Final answer:
The fault in a collision where a driver in front stops suddenly is typically with the driver behind due to the expectation to maintain a safe following distance and being able to stop safely.
Step-by-step explanation:
If a driver in front stops suddenly, and a collision occurs, it is typically the fault of the driver behind. This is because drivers are expected to maintain a safe following distance at all times, allowing enough space to stop safely if the car in front comes to an abrupt halt, regardless of the reason. Commonly, traffic laws dictate that the driver behind should be capable of stopping without colliding with the vehicle in front, even if the lead driver stops suddenly.
Therefore, most of the time, if a collision occurs under these circumstances, the blame is placed on the second driver for not maintaining a safe following distance or for driving distractedly or carelessly.