Following the success of the radar systems installed in the South Link Tunnel and on the E4 Highway, the Swedish highways agency selected scanning radar to provide AID on the E73.
The twin bore Hindhead Tunnel is 1.8km long. The UK Highways Agency required an AID system to detect traffic incidents, in order to respond quickly and provide assistance for people and vehicles stranded in the tunnel, and to detect slow/stopped vehicles and lost debris events escalating into a major incident as other road users become involved.
