RedSpeed™ operates using digital technology and therefore requires no film. Unmanned fixed equipment is installed at the roadside where traffic violations are automatically detected by the system using appropriate road sensors.

RedSpeed™ utilizes all of the functions of the RedGuard™ and SpeedCurb™ systems, and it is used at traffic light junctions to enforce traffic signals and speed limits. The system detects speed violations during the green and amber phases, and also detects red light violations.

Three images and a 12 second video clip are captured. The first is a zoom shot showing the vehicle number plate. The second is a wide angle image including the make, model, and colour of car and the offence data. The system then delays, for a period related to the vehicle's speed, and captures a third frame, also a wide angle image showing the time delay between frames. The two wide-angle images can be used as evidence to show that the vehicle was moving at the time of the recording.

Digital cameras record data relating to the offense and save the information along with the images that are taken. This data will vary according to the specific type of enforcement system installed. Information recorded with violation images taken by the RedSpeed system include:

• Site Identification, Name and Location
• Date and Time
• Lane and Head Number
• Offense and Frame Number
• Time into Red (RedGuard system)
• Previous Amber Time (RedGuard system)
• Speed (SpeedCurb system)

This information is encrypted, protected with message authenticated codes, and then stored ready for subsequent transmissions to a central computer. A built in flash module permits operation at night and uses three flash tubes. This means that the time between shots will be a lot quicker than single operating flash units, since no time is required to recharge the flash tube in between violation images.

Changeable operational parameters include:

• Flash setting
• Speed threshold
• Time into Red
• Selection of Specific Time Frames for Operation
• Statistics – Survey of Traffic usage
• System alarm

RedGuard™ - Red Light Violation Enforcement System

The state of traffic signals is continuously monitored and their ‘on’ time recorded by the system. When the red aspect is detected, a timer is started. When this timer exceeds the programmed ‘time into red’, the two road loops are monitored for detection of a moving vehicle. If a vehicle is detected, the program proceeds to violation capture, then two wide-angle images and one zoom image of the vehicle are recorded.

This image shows a red light violation

SpeedCurb™ - Speed Violation Enforcement System

The speed of vehicles passing through a monitored section of a roadway is measured by Piezo sensors buried in the road surface, or other detection methods. The RedSpeed program continuously monitors each of the speed sensor interfaces. As soon as a timing reading is received from the timing processor, it is checked for accuracy, sequence number, and validity, and converted to speed using the stored sensor spacing. If the measured speed exceeds the programmed speed threshold, then the vehicle presence loop is monitored until the vehicle clears the loop. The detective loops also trigger the enforcement system to take three images of the offending vehicle.

This image shows a speed violation

Encryption

By using key encryption codes (KEKS) an image is transformed into random data, ensuring that the nature of the data is unrecognizable to an unauthorized observer. This makes it totally impossible to select or alter any part of an image or even to monitor it, which allows for maximum security.

Transmission

By using digital technology this allows the data to be collected and transmitted automatically with minimal delay, normally within two minutes of the offence occurring, over a data network. Once the data is encrypted it can be transmitted to the back office via any communication protocol.

• Cellular
• PSTN
• ISDN
• ADSL – incorporating Satellite, Fibre and Microwave Radio Communication Technologies.