The Hume point-to-point camera system was first activated on 5 April 2007.
On 14 October 2010, Victoria Police suspended use of all point-to-point cameras on the Hume Freeway due to a technical software fault.
Following extensive testing and system improvements, Victoria Police reactivated the Hume cameras in August 2012.
The system consists of 10 cameras, with two positioned at five separate locations along the Hume Freeway. The cameras capture traffic travelling in both directions, effectively creating four northbound and four southbound point-to-point zones.
In addition to point-to-point enforcement, the cameras are now active for instantaneous enforcement. Instantaneous cameras measure the speed of a vehicle at the location of the camera.
All cameras on the Hume use in-road sensors, such as piezos, to activate the camera system.
According to the Road Safety Act 1986, the point-to-point average speed formula is based on the shortest distance and the time taken to travel between two points. The shortest distance is measured by an approved surveyor. Surveyor certificates can be found under Compliance certificates.
Point-to-point cameras take a set of digital images and then calculate the average speed by determining the time taken to travel from one point to the next. If the calculated average speed exceeds the speed limit, the incident is accepted and sent for verification.
Encrypted camera data is sent to two trained verification staff. They are required to independently review the data and must agree an incident has occurred. If both staff do not agree a third is asked to adjudicate.
All agreed incidents are then sent to the Traffic Camera Office (TCO) at Victoria Police for final revision and authorisation, only then is a fine issued.
All cameras on the Hume have quarterly and annual hardware and software maintenance carried out by a contracted traffic camera service provider. In addition to this, an independent company performs routine testing on Hume Freeway cameras.
An independent testing officer also certifies Hume Freeway cameras on an annual basis in accordance with the Road Safety (General) Regulations 2009. During certification, cameras are removed and replaced with newly certified devices. Upon successful completion of testing compliance certificates are issued for each camera.