Main featuresCoeval are pleased to introduce THE OVERHEIGHT VEHICLE DETECTOR SYSTEM This market leading system has been devised to assist the prevention of overheight vehicles colliding with low obstacles eg railway bridges tunnels viaducts aqua-ducts motorway junction networks and flyovers etc

The Overheight Detector constantly monitors traffic flow approaching low obstacles When an overheight vehicle is detected a sign illuminates instructing the driver to DIVERT STOP or TURN BACK Mounted on poles approximately 100 metres from the obstacle the warning provides sufficient time for the driver to take action to avoid collision as instructed This system not only protects the low obstacle but also other road users and members of the public Prevention of collision avoids costly repairs to the obstacle and the delays and inconvenience associated with such works

This system emits two beams of infra-red light from a pole on one side of the road to two detectors mounted on the opposite side of the road The beams of light are set to the warning height for the obstacle They detect overheight vehicles passing through the beams and trigger the system to illuminate the warning sign The system is direction sensitive ensuring that overheight vehicles moving away from the obstacle do not trigger a warning

This system offers advanced technology sensible optical design uncomplicated electronics and is vandal resistant For those requiring additional control remote monitoring and traffic camera triggering facilities are available As no two road layouts are the same the system is designed to be flexible and is pre-set at the time of installation

Success Of The Overheight Vehicle Detector SystemDocumented evidence suggests the use of THE OVERHEIGHT VEHICLE DETECTOR SYSTEM reduces the number of overheight vehicle accidents by at least 80 Other than removing the obstacle the system is regarded as the most effective signing measure available

Introduction to the 300 Series Overheight Vehicle DetectorThe detection of overheight vehicles is carried out by mounting the system control boxes and optical arrangements on modified street lighting columns at 901048616 to the traffic flow at the height(s) specified

There are either 2 or 4 infra-red light beams used depending on the site requirements 1 and 3 beam systems can also be configured but these are not compliant with the requirements of the UK Department of

Transport specifications MCE0147 and MCE0156 The Model 320 system has 2 beams for detecting and confirming overheight objects travelling towards the obstruction at the same height The Model 340 system has 4 beams for detecting and confirming overheight objects travelling towards the obstruction at either or both of two separate heights

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Intelligent illumination

Overheight Vehicle Detection

design | manufacture | install | maintain

Single height detection is used when the obstruction is essentially the same height across the whole width of the road such as girder railway bridges Dual height detection is used when the obstruction is of varying height such as an arched bridge when certain vehicles could pass under if moved to a different part of the road or stoppeddiverted as appropriate

There are two main parts to the operational system the Emitter unit and the Detector unit

Emitter Unit The Emitter controls up to 4 modulated infra-red light beam optical heads The width and repetition rate of the infra-red light pulses determines the maximum speed and length of detectable object that can be detected by each of the Detector optical heads In itrsquos simplest form the Emitter unit only requires the connection of either a 110 or 240 VAC supply to operate although there are various ways in which it can be connected to remote monitoring systems

Detector UnitThe Detector receives signals from up to 4 optical heads which are used for the detection of overheight objects The unit takes in the information and determines which direction the object is travelling in at what height and which output channels to activate (if any) to signal a high intensity sign to operate and help prevent a possible collision The Detector unit also has circuitry for receiving signals from up to 2 loop detectors to act as supplementary information in determining sign actuation

Compensation circuits keep the system from becoming ineffective in poor weather or environmental conditions A high level of system redundancy is built into the controlling electronics to provide excellent fault tolerance As with the Emitter unit there are various ways in which it can be connected to remote monitoring systems

Please note that the following descriptions in relation to equipment layout at the site and interconnection are for direct connection between Detector and Signing units Where a computer or some other controller is used to activate signing then consideration must be given to interface with the Detector and Emitter unit output relays and monitor the signals provided

Build OptionsSince this is a highly versatile system there are a large number of build options You may like to note the serial numbers and locations of all the units at the installation site for future reference on the following page

A complete list and explanation of all build options is contained in the User Manual

Intelligent illuminationParking Signs

t 0141 255 0840 e infocoevalukcom w coevalukcom

Single height detection is used when the obstruction is essentially the same height across the whole width of the road such as girder railway bridges Dual height detection is used when the obstruction is of varying height such as an arched bridge when certain vehicles could pass under if moved to a different part of the road or stoppeddiverted as appropriate

There are two main parts to the operational system the Emitter unit and the Detector unit

Emitter Unit The Emitter controls up to 4 modulated infra-red light beam optical heads The width and repetition rate of the infra-red light pulses determines the maximum speed and length of detectable object that can be detected by each of the Detector optical heads In itrsquos simplest form the Emitter unit only requires the connection of either a 110 or 240 VAC supply to operate although there are various ways in which it can be connected to remote monitoring systems

Detector UnitThe Detector receives signals from up to 4 optical heads which are used for the detection of overheight objects The unit takes in the information and determines which direction the object is travelling in at what height and which output channels to activate (if any) to signal a high intensity sign to operate and help prevent a possible collision The Detector unit also has circuitry for receiving signals from up to 2 loop detectors to act as supplementary information in determining sign actuation

Compensation circuits keep the system from becoming ineffective in poor weather or environmental conditions A high level of system redundancy is built into the controlling electronics to provide excellent fault tolerance As with the Emitter unit there are various ways in which it can be connected to remote monitoring systems

Please note that the following descriptions in relation to equipment layout at the site and interconnection are for direct connection between Detector and Signing units Where a computer or some other controller is used to activate signing then consideration must be given to interface with the Detector and Emitter unit output relays and monitor the signals provided

Build OptionsSince this is a highly versatile system there are a large number of build options You may like to note the serial numbers and locations of all the units at the installation site for future reference on the following page

A complete list and explanation of all build options is contained in the User Manual

Intelligent illuminationParking Signs

t 0141 255 0840 e infocoevalukcom w coevalukcom