When might an officer use 'Running Radar'?

The use of 'Running Radar' is most appropriately associated with traffic enforcement, specifically when an officer is actively checking the speed of vehicles on a roadway. This technique involves using radar technology to measure the speed of approaching or receding vehicles accurately, allowing law enforcement officers to identify those exceeding speed limits.

This practice is crucial in promoting road safety and ensuring that drivers adhere to speed regulations, thereby reducing the likelihood of accidents caused by speeding. While scenarios such as high-speed chases or crime scene investigations may involve aspects of speed and vehicle movement, they do not primarily focus on the enforcement of traffic laws as running radar does. Moreover, a vehicle inspection relates more to checking the condition of a vehicle rather than monitoring its speed. Thus, the context of traffic enforcement accurately encapsulates the purpose of running radar, making it the correct choice in this situation.