Redfusion Average Speed
This multi-point to point distributed average speed enforcement offers a flexible alternative to the more traditional spot-speed cameras. Rather than enforcing a single collision black spot, these systems can address a collision problem on a complete route, with cameras strategically located at entry and exit points along a route. The system captures the data of a vehicle at multiple points along the route in order to calculate the average speed at which the vehicle is travelling.
The multiple entry and exit points can be monitored as can changes to the posted speed limit along the route. Average speed enforcement delivers a much higher rate of compliance from drivers than traditional spot-speed cameras. Additional benefits include improvements to traffic flow as drivers maintain a consistent speed rather than slowing down on the approach cameras to avoid detection. This smoother flow of traffic can have a positive effect on congestion leading to improvements in fuel efficiency potentially reducing CO2 emissions. Our cameras also use a unique laser system to identify the presence of the vehicle so you can have confidence that our systems see all vehicles on a route, and can be used for vehicle counts and security purposes. This sets us apart from some of our competitors’ systems.
The UK Home Office Type Approved (HOTA) Redfusion system is made up of the following elements:
Remote Image Detector (RID). The camera heads are mounted on a pole either at the side of the road or across the road and the Automatic Number Plate Recognition (ANPR) system is located in a cabinet at the side of the road.
The camera heads are lane specific, each containing two cameras, one colour camera to capture an image of the vehicle and identifying its colour, make and model. A further monochrome camera is used to capture images of the Vehicle Registration Mark (VRM). Infra-red illuminators (IRs) are housed within the camera head for night time operation. The system relies on ambient lighting and inbuilt IRs are used rather than flash photography which makes it suitable for both front and rear facing image capture. Lastly, a laser trigger is also housed within the camera head and is used to identify a vehicles’ presence for enforcement purposes but it also provides the added benefits that this unique detection method allows.
The nature of the set up provides the most thorough RID in the market.
Decision Making Unit (DMU). DMUs are linked to a series of entry and exit point cameras situated along a route. Each DMU is capable of dealing with the data from multiple RIDs within the configured zone.
The DMU matches the VRMs from various entry and exit points within a percentage value using an advanced and exclusive pattern matching algorithm. When a match is found the journey time identified in the data captured at each RID and is compared to a certified baseline table. The baseline table takes into consideration the shortest possible route a vehicle could take on the monitored stretch of road whilst travelling at the posted speed limit; if a vehicle travels between the two camera points faster than the baseline calculation the driver has exceeded the posted speed limit, an offence package is created and sent for processing at the back office.
Evidence Retrieval Control Unit (ERCU). Situated in the back office, the ERCU receives data from up to 4 DMUs simultaneously. The system writes the encrypted data to a Write Once Read Many (WORM) drive and provides the primary evidence for all violations. A bespoke Graphical User Interface (GUI) on the hardware allows the user to see the system status at a glance and manage the offences collected.
Remote Pan Tilt Zoom (PTZ) functionality – With any system of this kind, the set procedure is quite critical to ensure the lane specific capture of vehicles is maintained. Our system is unique in that it has a remote PTZ functionality which enables us to undertake adjustments to the camera system remotely and negates the need for unnecessary and expensive traffic management – unlike our competitors’ equipment.
This is especially advantageous in roadworks applications such as TASCAR (Temporary Average Speed Cameras At Roadworks). Due to the fluid nature of traffic management coming through carriageway construction sites, the Traffic Management layout frequently changes, but our system can be adjusted without using MEWPS (Mobile Elevating Work Platforms) and so reducing the need for further additional coning that our competitors will require.