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Active Traffic Management in detail

How was it constructed?

The construction work necessary for Active Traffic Management began in Spring 2003 and was fully completed from junctions 3A-7 by June 2005.

Civil engineering work included:

  • Construction of emergency refuge areas
  • Construction of bases for the lightweight gantries
  • Production and erection of the gantries, upon which all electronic signals and signs are mounted
  • Provision of lighting along the length of the scheme
  • Construction of a safety barrier by the side of the verge to protect drivers and Active Traffic Management equipment
  • Creation of a trough along the length of the scheme to house the cabling which supplies power and provides a connection between the CCTV cameras and the control centre

In December 2004 works between junction 3A and 5 were completed and the first elements of the project were switched on to provide benefits to road users. This enabled the lifting of the hard shoulder closure and 50mph speed limit along this section. New lighting, the Motorway Incident Detection and Automatic Signalling (MIDAS) system and new electronic signs displaying advisory speed limits over each of the running lanes, are now in use to provide a safer driving environment for the travelling public.

Following this, in June 2005 the works were substantially completed and the first full phase of operation began - Advisory signs and signals along the whole scheme length junctions 3A - 7.