What kind of technology do speed cameras typically employ?

• A. Laser technology
• B. Infrared sensors
• C. Radar technology
• D. High-resolution imaging

Answer: (C)

Speed cameras typically employ radar technology to measure vehicle speed. This technology works by emitting radio waves that bounce off moving vehicles. By analyzing the time it takes for the waves to return, the system can calculate the speed of the vehicle accurately. Radar is widely used in various types of speed enforcement systems due to its effectiveness over long distances and its ability to provide reliable measurements in different weather conditions.

While other technologies such as laser and infrared sensors can also be used for speed measurement, they have different applications and may not be the primary choice for all speed cameras. Laser technology, for example, typically requires a direct line of sight to the target vehicle and is often used in handheld devices by law enforcement officers rather than fixed cameras. High-resolution imaging is more about capturing the details of vehicles for identification purposes rather than directly measuring speed, though it can complement speed measurement technologies.

Overall, radar technology's combination of accuracy, versatility, and ease of use makes it the preferred method employed by many speed cameras.