What formula is used to calculate the spacing of vehicles in feet?

The formula to calculate the spacing of vehicles in feet is based on the relationship between speed, volume, and time. The correct option, which indicates that spacing can be derived from the volume of vehicles, suggests that you can determine the physical distance between vehicles by understanding the relationship of vehicle flow over a given time frame.

Specifically, the formula S = 3600/Volume relates to how many vehicles pass a point in one hour (hence the factor of 3600 seconds in an hour). When volume is defined as vehicles per hour, you can calculate the spacing of vehicles on the roadway. The idea is that, if you know how many vehicles are occupying a given length of road, you can derive the average distance between vehicles, providing practical information for traffic management and road design.

In practice, spacing helps ensure smooth flow and can reduce the risk of collisions, which is why understanding this calculation is essential in civil engineering and transportation planning.