also this has popped up on the DoJ site recently
Testing of cameras on Eastlink http://www.justice.vic.gov.au/wps/wcm/connect/DOJ+Internet/Home/Community+Safety/Road+Safety/JUSTICE+-+Testing+of+cameras+on+Eastlink+-+weblinkYou may see contractors carrying out testing of cameras on Eastlink this month.
This is part of scheduled quarterly testing carried out across the speed camera network.
Victoria has among the robust and rigorous camera testing regime in the world.
Quarterly testing has been in place in Victoria since 2005 and looks at both the primary and secondary speed measurement devices to measure speed accuracy and speed reliability. Sensor tests are also performed.
Quarterly testing is carried out in addition to yearly testing of cameras.
Every year, the speed measurement devices, which are the primary component of a speed camera that enables it to detect and measure a vehicle's travelling speed, are tested and certified. This is the testing that is required under the Road Safety (General) Regulations 1999.
Fixed freeway speed cameras http://www.justice.vic.gov.au/wps/wcm/connect/Road+Safety/Home/Traffic+Cameras/Types+of+Cameras/RSAFETY+-+Fixed+freeway+speed+camerasFixed freeway speed cameras are placed along freeways and in tunnels to detect speeding vehicles.
In-road sensorsIn-road sensors linked to speed cameras are one method of speed detection used on fixed freeway speed camera systems.
Two in-road sensors are placed at a fixed distance apart and measure the time it takes a vehicle to travel between each sensor. If the sensors record that a vehicle's speed is greater than the posted speed limit, a photograph of the vehicle is taken.
These sensors are used on Geelong Road, the Monash Freeway, and in the Domain and Burnley Tunnels.
Fixed radarThe other method of speed detection on freeways is the use of fixed radar cameras. These are typically installed above the traffic on gantries and bridges.
Fixed radar cameras operate on the Western Ring Road and on EastLink.A fixed radar camera uses radar technology to detect levels of speeding. A frequency is transmitted from the radar, which bounces off the vehicle allowing the camera to record the vehicle speed. For more information on radar technology, see the Doppler Effect explained.
If an offence is detected by either a fixed radar or in-road sensor, a photograph is taken. Each photograph is subjected to rigorous verification processes before it is authorised by Victoria Police as a valid infringement.
Initially, each photograph is assessed by a qualified and trained verifications officer. A second officer then reviews the decision.
Prior to any infringement being issued, each camera session is reviewed and authorised by sworn police officers of the Victoria Police Traffic Camera Office.
The 'Doppler Effect' explainedRadar technology is based on the 'Doppler effect'. Speed is calculated by measuring the change in the return radar frequency that is reflected by a moving vehicle.
A simple way of understanding the 'Doppler effect' is to think of the siren's pitch of a passing ambulance. The siren’s pitch changes as the vehicle races towards and then away from you. This change in pitch is the result of a change in the frequency of sound waves; if you could measure the rate of change of pitch, you could also estimate the ambulance’s speed.
Handheld radar devices use the same principle. Radar guns aim an electromagnetic signal at a target vehicle and then pick up the return signal reflected off the vehicle. The device then measures the frequency of the reflected radar to determine the speed of the vehicle.
Fixed freeway camera locations http://www.justice.vic.gov.au/wps/wcm/connect/Road+Safety/Home/Traffic+Cameras/Types+of+Cameras/RSAFETY+-+Fixed+freeway+camera+locationsWest Gate Freeway, Millers Road Gantry, Geelong Bound, Altona North
Princes Freeway, Forsyth Road Bridge, Geelong Bound, Hoppers Crossing
Princes Freeway, Point Wilson Road Bridge, Geelong Bound, Little River
Princes Freeway, Avalon Road Bridge, Geelong Bound, Lara
Princes Freeway, Point Wilson Road Bridge, Melbourne Bound, Little River
Princes Freeway, Avalon Road Bridge, Melbourne Bound, Lara
Princes Freeway, Forsyth Road Bridge, Melbourne Bound, Hoppers Crossing
West Gate Freeway, Grieve Parade Bridge, Melbourne Bound, Altona North
Western Ring RoadWestern Ring Road, Glenroy, Westbound Widford Street Bridge, Glenroy
Western Ring Road, Keilor Park, Southbound Fullarton Road Bridge, Keilor Park
Western Ring Road, Ardeer, Southbound Western Highway North Side Gantry, Ardeer
Western Ring Road, Sunshine West, Southbound Boundary Road North Side Gantry, Sunshine West
Western Ring Road, Jacana, Eastbound Pascoe Vale Road Underpass, Jacana
Western Ring Road, Keilor East, Northbound Keilor Park Drive Bridge, Keilor East
Western Ring Road, Deer Park, Northbound Western Highway South Side Gantry, Deer Park
Western Ring Road, Deer Park, Northbound Western Highway Off Ramp, Deer Park
Western Ring Road, Laverton North, Northbound Boundary Road South Side Gantry, Laverton North
CityLinkLeft Lane, Domain Tunnel, Approximately 735 Metres After Tunnel Entrance, Melbourne
Middle Lane, Domain Tunnel, Approximately 735 Metres After Tunnel Entrance, Melbourne
Right Lane, Domain Tunnel, Approximately 735 Metres After Tunnel Entrance, Melbourne
Punt Road Exit Lane, Monash Freeway, Approximately 550 Metres Before Tunnel Entrance, Richmond
Left Lane, Monash Freeway, Approximately 550 Metres Before Tunnel Entrance, Richmond
Middle Lane, Monash Freeway, Approximately 550 Metres Before Tunnel Entrance, Richmond
Right Lane, Monash Freeway, Approximately 550 Metres Before Tunnel Entrance, Richmond
Left Lane, Burnley Tunnel, Approx 2110 Metres After Tunnel Entrance, Richmond
Middle Lane, Burnley Tunnel, Approx 2110 Metres After Tunnel Entrance, Richmond
Right Lane, Burnley Tunnel, Approx 2110 Metres After Tunnel Entrance, Richmond
EastLinkMullum Mullum Tunnel, Donvale Approximately 600 Metres Prior to Tunnel Exit, Donvale
EastLink, Rowville, Southbound Wellington Road Bridge, Rowville
EastLink, Keysborough, Southbound Dandenong Bypass Bridge, Keysborough
Melba Tunnel, Donvale Approximately 500 Metres Prior to Tunnel Exit, Donvale
EastLink, Rowville, Northbound Wellington Road Bridge, Rowville
EastLink, Keysborough, Northbound Dandenong Bypass Bridge, Keysborough
