MOTORISTS will spend less time queueing at tunnels when automatic toll collection is approved by the Legislative Council. The Executive Council has already endorsed the proposed changes to tunnel-related ordinances, and the bills, to be gazetted on Friday, will take effect once approved by Legco. The Cross-Harbour Tunnel and the Aberdeen Tunnel will be the first to benefit from the changes, with plans to install the system by August. Under the auto-toll collection system, motorists will open an account with the tunnel company and a tag will be fixed to windscreens. Their accounts will be debited each time the car passes through an auto-toll lane. A trial scheme started at the Aberdeen Tunnel in April last year and proved a success. Mr Gerry Higginson, the chairman of the Cross-Harbour Tunnel Company, which also runs the Aberdeen Tunnel, said ''it will be in the drivers' interests'' to have the system. He said it would make the tunnels more user-friendly, saving motorists time and trouble. In the long term, the system would reduce operating costs as fewer staff would be required. The subscription fee for the system would be about $300 to $500, while the monthly administration fee would be $20, he said.