Motorways/NMCS2

Peek is one of the major motorway system suppliers to the Highways Agency, and have been continuously involved in the development of the following:

 

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MIDAS Outstation – IP enabled Incident detection unit

MIDAS is one of the Highways Agency’s most important tools for improving traffic flow and managing congestion on the nation’s motorway network. Traffic detectors installed in the road surface monitor the volume and speeds of vehicles in each lane. The MIDAS Outstation processes this information and generates alarms as flow builds up to critical levels. This keeps the motorway operators fully informed of traffic conditions, enables diversion strategies, warning messages and reduced speed limits to be posted on the electronic message signs.
Peek’s new IP enabled outstation is fully compliant with the latest HA specifications for MIDAS. The outstation provides interfaces for up to 20 standard loops (used in pairs) and runs detection algorithms to identify when an incident has occurred. Multiple algorithms are supported and can be simultaneously enabled covering speed, flow and occupancy.

 

MIDAS Outstation – IP enabled Incident detection unit VIEW LARGER

The new generation IP enabled outstation builds on the proven functionality provided in previous generations of MIDAS Outstations by adding:
  • RS485 and Ethernet communication interfaces The new generation MIDAS Outstation can interface to the NMCS2 MIDAS Infrastructure by the existing RS485 network or directly onto the HA's new IP network..

  • Interface to new IP Address Plug The new generation MIDAS Outstation interfaces with an IP Address Plug Type 9300. This address plug has also been provided by Peek and approved to the latest HA specifications. PC based software allows an address plug to be programmed with data defined by an XML schema issued and controlled by the HA for enhanced asset management.

  • Implementation of the HIOCC 2 algorithm The implementation of both HIOCC and HIOCC2 algorithms provides faster alert clearance during times of low traffic volume and more efficient alert handling.

  • Serial and parallel detector interface provides the possibility for the implementation of alternate detector technology, to support the HA's initiatives to deploy other detector products for specific applications.


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MIDAS Interface Unit

Peek’s MIDAS Interface Unit conforms to Highways Agency specification TR2178. A compact 1U high 19” rack mounted design it provides the interface between the MIDAS Local Communications Controller (MLCC) and the MIDAS transponders. Its function is to distribute the upstream RS232 link data onto two RS485 multi-drop downstream links giving the unit the ability to communicate with transponders spread over a 10km section of the network. To achieve this function the unit synchronises the data streams from the upstream link (typically modem or PCM data channel) with those of the downstream links.

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IDS

The Peek Incident Detection System (IDS) unit is a stand alone inductive loop based outstation rack. It incorporates Peek’s proven logic processor module, and has capacity for up to 8 detector cards, providing up to 32 channels of detection. The unit runs a number of incident detection algorithms including HIOCC and can log a range of measurements depending on its configuration including counts and categorisation by speed. Provided with an RS485 interface the unit is designed to operate in a system typically with many outstations and a single configuration and data gathering instation. The communication protocol for the rack is provided by Peek to enable users to prepare their own instations customised to their precise needs.
  

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Standard Transponder

Peek’s Standard Transponder Unit conforms to Highways Agency specification TR2045. A compact 2U high 19” rack mount design it provides the interface between the Standard Local Communications Controller (LCC) and the drivers for the various HATMS motorway devices including matrix signs, message signs & fog detectors. It provides the necessary translation of commands from the instation to the instructions required by the various drivers and also intelligent aspect adaptation if it detects that a sign has developed a sufficiently severe fault.
 

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Local Communications Controller

Peek’s Local Communications Controller conforms to Highways Agency specification TR2046. A compact 2U high 19” rack mount design it provides an intelligent router interface between the sign subsystem and the transponders. On the upstream side it communicates using the X25 protocol, typically via V29 modems and on the 4 multi-drop downstream ports it communicates using the HDLC protocol, usually via V26 modems.

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HADECS

The Highways Agency Digital Enforcement Camera System (HADECS) is a digital enforcement product designed in the first instance to record violations of speed limits set via variable speed signs. As such it automatically adjusts its speed threshold to that appropriate for the displayed sign. Combining radar technology for speed detection and multiple cameras for image capture the camera outstation section of the equipment captures offence data and encrypts it to the standards specified by the UK HOSDB. This data is then automatically collected a number of times each day and saved to DVD in a secure police office by the HADECS instation.
  

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The instation equipment additionally has functions for decrypting the evidence, displaying the offences and for performing the UK mandatory Secondary Speed Check. Offences that pass this test are then exported to be picked up by a back office processing system. Other functionality at the instation enables control of the camera outstations including enabling and disabling them, setting their speed thresholds, instigating the outstations to perform a self test and recovery of evidential and log data on demand. The instation is intuitive to use and includes a map interface to provide visualisation of the speed enforcement locations and their current status.

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