When police use handheld radars, why aren motorists given the same warning as with fixed speed cameras?
JH: Cameras and radars ensure that motorists comply with speed limits. With handheld radars, the driver is dealt with on the spot providing instant enforcement of the speed limit. Warning signs at fixed camera locations can prevent a situation where a driver may keep passing a camera location and incur infringements repeatedly, as it can take time for their first infringement to arrive in the mail. OR: Do radars monitor cars travelling towards the radar, away or both? JH: When mobile, ie. in highway patrol cars, radars measure the speed of approaching vehicles, and when stationary they can measure both approaching and receding speeds. In addition, Lidars (another type of handheld speed enforcement device) can measure the speed of vehicles travelling in both directions. OR: Can radars book several cars at a time, or two cars driving parallel in separate lanes? JH: It’s possible in some circumstances to identify more than one vehicle speeding. This is carried out by the operator observin
