§ Mr. David PorterTo ask the Secretary of State for Transport if he will make a further statement on his Department's criteria for assessing the economic performance of new road schemes coming forward from 1988–89 onwards for(a) East Anglia and (b) Suffolk and Norfolk.
§ Mr. Peter BottomleyThe Department's criteria for assessing the economic performance of all new trunk road schemes are based on the Department's computer system of cost benefit analysis, COBA9, which compares the costs of road schemes with the benefits to road users from time savings, reductions in the number and severity of accidents, and changes in vehicle operating costs.