What is the function of speed cameras in traffic enforcement?

The function of speed cameras in traffic enforcement is to automatically capture images of vehicles exceeding speed limits. These devices are strategically placed in areas known for high traffic violations and are designed to enhance road safety by deterring speeding. When a vehicle exceeds the designated speed limit, the camera activates and records photographic evidence, which typically includes the speed of the vehicle and details such as the time and date of the infraction. This automated process allows law enforcement to issue citations without requiring an officer to be present at the scene, thereby streamlining the enforcement of speed limits and contributing to overall traffic safety.

The other options, while related to traffic enforcement, do not accurately capture the primary role of speed cameras. For instance, photographing license plates for future reference relates more to general surveillance rather than the specific enforcement of speed limits. Monitoring traffic flow without fines does not align with the punitive nature of speed cameras, which are intended to penalize those who violate speed regulations. Lastly, while speed cameras may contribute to overall traffic regulation, they do not support parking enforcement, which involves different types of cameras and enforcement strategies focused on illegal parking rather than speeding.