What unit is commonly used to measure speed in radar systems?

In radar systems, speed can be measured in various units depending on the regional standards and preferences of law enforcement agencies. Miles per hour, feet per second, and kilometers per hour are all valid units of speed used in different contexts.

For example, miles per hour is commonly used in the United States for traffic enforcement. Feet per second may be used in more specialized contexts where precision is necessary, particularly in scientific measurements or specific applications. Kilometers per hour is widely utilized in many countries around the world, especially where the metric system is in use.

The inclusion of "All of the above" as the correct answer indicates that radar systems are versatile and capable of providing speed readings in any of these units, accommodating different practices and regulations internationally and domestically. This flexibility is important for ensuring that the technology can be effectively used in various jurisdictions.