What is the required stopping distance at railroad crossings?

The required stopping distance at railroad crossings is stipulated to be within 50 feet but no less than 15 feet to ensure safety when approaching these potentially hazardous areas. This range provides a critical buffer zone that allows drivers to stop their vehicles safely and effectively if a train is approaching or if the warning signals are activated.

The minimum of 15 feet ensures that vehicles are not too close to the tracks when waiting for a train, which could lead to devastating consequences in case a train is coming. Meanwhile, the maximum distance of 50 feet allows for enough space for the vehicle to slow down and stop without obstructing the crossing, maintaining a clear pathway for both the train and other traffic.

Considering the distances mentioned in the other choices correctly reflects the importance of adhering to safe stopping distances at crossings to avoid accidents.