Dartford Crossing gets enhanced PA system

A new traffic safety system installed on The Dartford Crossing, the busiest estuarial crossing in the UK, is benefitting from a high quality public address (PA) system to communicate with drivers in the event of an incident. To combat the noisy road and traffic conditions, PEL Services installed a Bosch Praesideo digital PA system, with master and slave network-controllers and incorporating ambient noise sensing to automatically adjust sound levels to compensate for substantial variations in the levels o
May 25, 2016 Read time: 2 mins
A new traffic safety system installed on The Dartford Crossing, the busiest estuarial crossing in the UK, is benefitting from a high quality public address (PA) system to communicate with drivers in the event of an incident.

To combat the noisy road and traffic conditions, 8431 PEL Services installed a 311 Bosch Praesideo digital PA system, with master and slave network-controllers and incorporating ambient noise sensing to automatically adjust sound levels to compensate for substantial variations in the levels of background traffic noise.  The system has been set to maintain the sound level at 5dB above ambient levels, in real time, to ensure announcements are audible but not anti-socially loud.

Twelve Bosch LBC 3432-03 unidirectional projection speakers have been used with Praesideo at four locations; three speakers on each pole, at different heights to cater for the varying vehicle heights.  The speakers have been configured in a contingent redundant arrangement, as an additional fail-safe. There are three amplifiers for each location including one on standby and the entire system is connected to an uninterrupted power supply.
Urban Traffic Control

For more information on companies in this article

Related Content

  • Tighten up on cyber security before hackers infiltrate ITS infrastructure
    October 19, 2015
    This year’s ITS World Congress in Bordeaux will have three sessions dedicated to cyber security and the issue will also be addressed under connected and automated vehicles categories. Jon Masters finds out why. American security researchers Charlie Miller and Chris Valasek attracted international press coverage recently when they demonstrated how they could hack into and take control of a vehicle from a remote laptop. While the implications are clearly serious for vehicle manufacturers, highway and transpor
    Read More
  • Success of London's Olympic public transport systems
    December 4, 2012
    The Olympic flame has moved on, allowing review of the relative degrees of London’s 2012 transportation success, how it was done and with what lasting effects. Jon Masters reports. This magazine’s international position provides a good vantage point for assessing impressions left by London’s 2012 Olympic Games. On the whole, it has been only praise and congratulations heard since the closing ceremonies of the Olympic Games in August and the Paralympics in September. The events looked great and ran smoothly
    Read More
  • Hartford’s tailors winter maintenance on Esri’s GIS platform
    August 5, 2016
    The in-house winter maintenance and vehicle tracking system built by the Public Works Department in Hartford, Connecticut, coped with record snowfalls and cut costs too. When it comes to dealing with the effects of mother nature, transport agencies can find themselves in a lose-lose situation: criticised if the roads or rail lines are disrupted by snow, ice or floods for more than a few hours and lambasted for wasting money if the equipment and stockpiles put in place for a hard winter remain unused.
    Read More
  • New traffic light controller is ‘game changer’ says Siemens
    June 6, 2014
    Siemens’ introduced its new Sitraffic sX controller as a ‘game changer’, Colin Sowman finds out why.
    Read More

Highlighted Content