What is the primary purpose of a radar speed sign?

The primary purpose of a radar speed sign is to inform drivers of their current speed and promote compliance with speed limits. These signs serve as a visual reminder to drivers about their speed and encourage them to adhere to posted limits, thus enhancing road safety. When drivers are made aware of how fast they are traveling, there is often a behavioral response that can lead to reduced speeds, ultimately helping to prevent accidents and improve safety for all road users.

While recording speed for law enforcement (the first option) and collecting traffic data (the fourth option) may be secondary functions of some radar speed signs, they are not the main goal of these signs. Assisting officers in traffic light control (the third option) is also not a primary function related to radar speed signs. Their design and implementation primarily focus on driver awareness and compliance, making option B the most accurate representation of their intended function.