§ Mr. Clive Bossom
asked the Minister of Transport what official research is being undertaken into methods of limiting fumes both from diesel and petrol-driven vehicles; and what were the results of the nation-wide smoke check on 8th April.
§ Mr. Marples
No official research is being undertaken into means of reducing such fumes; this can best be done by the engine manufacturers, who fully appreciate the need for it. The measurement of smoke from diesel engine exhaust gases has been under investigation by the Department of Scientific and Industrial Research.
The number of vehicles found making too much smoke during the roadside check on 8th April was nearly 3,000 out of a total of 25,570 which were observed. Prohibition notices were issued for 2,068 vehicles, 107 of which became subject to immediate prohibition.