How do RADAR units affect traffic safety?

The option indicating that RADAR units serve as a deterrent to speeding is accurate because the presence of RADAR technology creates an awareness among drivers regarding the enforcement of speed limits. When drivers see or know that a RADAR unit is monitoring their speed, they are more likely to slow down and adhere to speed regulations to avoid potential penalties. This psychological effect helps improve overall traffic safety by encouraging compliance with speed limits.

Moreover, the visibility of RADAR units can lead drivers to adopt safer driving behaviors not just in the immediate vicinity of the unit, but also in the broader area, as drivers become more cautious. The intended outcome of this proactive deterrence is to reduce the likelihood of speed-related accidents, thereby enhancing the safety of all road users.

While other options may address aspects of RADAR units, they do not accurately capture the primary role of these devices in promoting traffic compliance and safety. For example, although RADAR units can sometimes result in fines for speeding violations, this is a consequence of their deterrent effect rather than the primary goal of their implementation. Furthermore, RADAR units are effective during both day and night, contradicting the notion that they are only functional at night.