Other speed checking devices
Police also use other technology that does not rely photographs being taken of an offence, typically where officers enforce the speed limit in person.
Silver Eagle
New South Wales police used the Silver Eagle vehicle-mounted unit. This radar device is typically mounted on the right hand side of the
vehicle just behind the driver, and is operated from inside the vehicle.
The units are approved for use only in rural areas where traffic is
sparse, and may be used from a stationary or moving vehicle.
Stalker
Police vehicles in New South Wales have recently been fitted with a dual-radar known as the Stalker DSR 2X, which is able to monitor vehicles moving in two different directions at the same time.
Other
NSW police also use LIDAR devices (brand unknown) as well as vehicle speedometers and subjective speed estimates to prosecute speeding motorists.
The TIRTL device is deployed as a speed measurement sensor in Victoria, consisting of a series of infrared beams at wheel height.[4] Although the sensors themselves are very difficult to see, they are accompanied by a standard Traffipax camera to capture images of the offence. The state of New South Wales approved the device in November 2008 for use in the state.
Motorcycle and bicycle-mounted police in New South Wales are now equipped with the binocular-styled "Pro-Lite+" LIDAR device.
(Source: Wikipedia)