No abstract

Two studies on noise abatement in urban areas, performed for the Dutch Ministerie of Transport (SSZ program), are presented. The first is a feasibility study on noise reduction of a range of vehicles. Buses and lorries were found to have comparable noise levels, whereas delivery vans and taxis were found to be much quieter. Specific noise sources can be high. More stringent (European) regulation or governmental stimulation measures are required. A survey was held amongst 396 inhabitants in two cities. Most noise disturbance was shown to be caused by buses (low-frequency acceleration noise). The second study was on noise disturbance during goods delivery to shops. This was initiated after the extension of business hours and the introduction of stricter regulations (60 dB peak limit). Current measured peak A-weighted noise levels at 7.5 m were found to vary between 60 and 95 dB. The study concluded that noise control measures for most sources are technically achievable within three years. Initial estimates indicate 10%–20% higher investment on vehicles and handling equipment. Lorry diesel engine noise is about 15 dB too high. Well-designed quiet electric traction systems are a quieter alternative.