Highways Agency and the NASS Project The Highways Agency (HA) is responsible for managing, maintaining and improving the motorway and trunk road network in England. Several computer systens are im- plemented to help with the task of avoiding congestion. The National Motorway Com- munication System 2 (NMCS2) is a major system, used to control roadside equipment and monitor road conditions. HA decided to run an Active Traffic Management (ATM) pi

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