Skip to main content

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.

For more information on companies in this article

Related Content

  • Standardised technology aids low cost wireless communication
    November 13, 2012
    In the UK, the necessary radio spectrum has been identified and standardised technology developed to allow cost effective wireless communication between cars, devices and other ‘machines’. This by Professor William Webb. A world free of traffic congestion, with intelligent systems directing vehicles and alerting drivers to free parking spaces may sound a far off fantasy to motorists stuck in seemingly endless queues on the outskirts of London. Yet this is a scenario not confined to the world of science fict
  • Upgrading Koblenz's traffic information system
    March 1, 2013
    David Crawford reviews an award-winning scheme that delivered a 30% increase in website usage – below budget The German Federal Agricul­tural Show (Bundesgarten­schau, BUGA) runs between mid-April and mid-October every other year in a differ­ent city. The most recent, 2011, edition took place in Koblenz, a medium-sized community with a population of just over 105,000 in the Rheinland-Pfalz region, and was expected to draw an additional 40,000 visitors a day to its central area. Traffic access from the moto
  • Improving traffic flow with automated urban traffic control
    April 25, 2012
    Alterations to traffic signals and variable message signs are being activated to reduce congestion as soon as it occurs, through a pioneering fully automatic UTC system. Jon Masters reports In the South Yorkshire town of Barnsley in England, strategies for dealing with traffic congestion have been devised from analysis of queue data, then made to work automatically: “This represents the future of ITS for urban traffic control,” says Siemens Consultancy Services senior engineer David Carr. Over a career span
  • Keeping a weather eye on road conditions
    September 26, 2014
    Drive C2X has shown that advanced warning of poor road conditions could cut fatalities, as David Crawford explains. Connected vehicle (CV)-based warning technologies could mean 6% fewer deaths and 5% fewer injuries in road traffic accidents in Europe, according to the final results of the European Commission (EC) co-funded DRIVE C2X project. According to the European Centre for Information and Communication Technologies (EICT) which provided management support, these “prove that CV systems work and can hav