The Mayor's Ambient Noise Strategy - Greater London Authority

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The Mayor’s Ambient Noise Strategy Mayor of London 91 Motorcycle Working Group is convened by Transport for London. This includes user groups, the police and the boroughs. The main aims of the Group are to promote a reduction in casualties, improve facilities for motorcycles, and reduce environmental harm. Box 34: Motorcycle noise levels Modern motorcycles, as type approved, and when used responsibly, have become much quieter than in the past. Standard noise test limits have been significantly reduced since the 1970s. From June 1999, noise limits for new motorcycles approved to EU Directive 97/24/EC, Chapter 9, are: ■ ■ ■ ■ Mopeds - 71 dB(A); Up to and including 80 cc engine size - 75 dB(A); Between 80 and 175 cc - 77 dB(A); Above 175 cc - 80 dB(A). Limits for motorcycles first used from April 1991 were 2 dB(A) higher than the above figures. It is an offence to sell replacement motorcycle silencers which do not carry prescribed approval markings. 22 Periodic roadworthiness testing of motorcycles includes a check that they are fitted with correctly marked approved silencer systems. Noise levels inside motorcycle helmets can be a ‘healthy hearing’ issue for those, such as despatch riders, who spend long periods on their machines at higher speeds. This may affect their perception of the noise they make. Hearing protection measures integrated with helmet design are increasingly available. proposal 15 Transport for London through the London Motorcycle Working Group will, as funding allows, explore ways in which motorcyclists, moped and scooter users can be encouraged to maintain the noise specification of their machines as type approved; to drive more quietly and smoothly, as well as more safely; and to consider the benefits of hearing protection while riding, subject to road safety. The need for public communication and consistent and firm enforcement should be kept under review. Assessing and prioritising action 4A.68 The suitability and effectiveness of the above measures will vary according to particular local circumstances. The noise reduction achieved by a single measure may be modest. Measures are likely to need to be combined to affect popular perception, although it would not be acoustically effective to combine certain measures. The effectiveness of
92 Mayor of London The Mayor’s Ambient Noise Strategy an individual noise reduction will often depend on what other noise sources are present, and how they inter-relate. This implies the need for assembling bundles of noise reduction measures which can preferably be implemented together, or at least in planned sequence. Action needs to be integrated on a local area basis, taking account of other ‘secondary’ sources of annoyance, wherever possible. 4A.69 Works to reduce noise cannot be considered in isolation from measures to manage the street network for other purposes. Priorities for reducing noise need to be developed alongside those for speed, road safety, air quality, energy use, bus priority, provision for cyclists and walkers, severance, and other issues. The inter-relationships need to be assessed, including effects on perceptions as well as physical noise levels. Working with those affected is likely to contribute to increasing satisfaction. 4A.70 A multi-criteria approach is therefore needed, assessing the effectiveness and suitability of all potential methods of noise-reduction in the particular circumstances of each section of road in its environment, to achieve the best combination of outcomes with the resources that can be secured. Routine ‘Sound Audit’ of changes is needed (see glossary). This should take account of sound quality and wider soundscape issues, as well as road traffic noise, narrowly defined. It will ensure that opportunities are not lost to fine tune, for noise minimisation, schemes originated for other reasons, such as safety. Assessment methods have historically been developed primarily for larger inter-urban road schemes. Assessment methods need to be able to deal with urban-scale and finer-resolution projects and programmes. Resources devoted to audit or assessment should, of course, be proportionate to the scale of benefits achievable. Box 35: Transport for London - Business Plan Transport for London’s Business Plan for the period 2004/5 to 2009/10 includes key environmental measures being taken by TfL to mitigate negative impacts of the transport network and to promote sustainable transport. Relevant work is part of other Business Plan headings, rather than comprising a separately identified environmental budget. TfL works on noise reduction through a number of projects, for example, using low noise surfacing when resurfacing as part of the maintenance programme, in the bus vehicle replacement programme, etc. TfL Surface Transport intends to develop its business planning process to enable clearer identification of how projects support social inclusion, and the Mayor’s Transport and other strategies, including the London Ambient Noise Strategy. TfL’s project appraisal for large projects considers noise alongside other environmental issues.
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