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.

Related Content

  • Less travel aggravation to blunt Aggieland fans’ motivation
    June 17, 2016
    Returning travel times to normal within two hours of the end of a major football game was the challenge facing College Station, Adam Lyons explains how this was achieved. College Station, TX, also known as ‘Aggieland’, is located right in the middle of the Dallas/Fort Worth, San Antonio and Houston triangle making the city accessible to over 14 million Texans within less than a four-hour drive. One of the biggest draws to this area is Texas A&M University (TAMU) and the Aggie football games in the fall, mea
  • Growing use of video monitoring in traffic management
    February 2, 2012
    The county-wide expansion of CCTV coverage in Florida Department of Transportation's District Four is detailed by Citilog's Eric Toffin
  • Singapore plans changes to transit system
    June 13, 2018
    Singapore has the third-highest population density in the world and the numbers are continuing to grow. The government knows that transit is vital: David Crawford investigates the city state’s Smart Nation strategy. Transport is the most important of the five domains identified as the pillars of Singapore's far-reaching Smart Nation strategy, launched in November 2014 by prime minister Lee Hsien Loong with the aim of reaching fulfilment by 2024. Roads account for 12% of the island republic's 719km2 land ar
  • US 511 system, the future of traveller information?
    April 23, 2013
    What started out at the turn of the millenium as a simple dial-up travel information service has grown out of all recognition in the digital age. Pete Goldin surveys the development to date of the US 511 traveller information system. In a little over a decade, 511 has gone from its original intent – a collection of recorded messages accessible via phone for pre-trip planning – to a network of dynamic traveller information services provided by states and cities throughout the US, offering access to a wide v