The Mayor's Ambient Noise Strategy - Greater London Authority

The Mayor’s Ambient Noise Strategy Mayor of London 65
jobs. With the Mayor’s policies to improve public transport, walking and
cycling, the net effect in outer London is likely to be to reduce the growth
in traffic by a third over this period. Where appropriate, boroughs are
encouraged to introduce local measures to reduce this growth further. In
outer London town centres, potential is seen to achieve zero growth,
particularly where through traffic can be removed. However, due to the
non-linear nature of noise (see Appendix A2), traffic reduction is less
effective at reducing noise on all but the least busy roads than it is, say, for
improving air quality. The Mayor’s Transport Strategy (e.g. Proposal 4P.4)
and Air Quality Strategy (e.g. Policy 4) also promote travel plans and travel
awareness campaigns to promote sustainable alternatives. The London Plan
(e.g. Policies 3C.1 and 2) seeks to locate high trip generating development
where public transport accessibility and capacity are high, so encouraging a
shift towards public transport.
Figure 13 Noise emitted from London road traffic modelling network in 2001
dB L A10,18hour
over 76
74 to 76
72 to 74
70 to 72
68 to 70
under 68
source:
note:
MVA modelling for Transport for London
This diagram shows the “basic noise level”, 10 metres from the edge of the carriageway
and assuming no obstructions, for road links for which consistent traffic data was
available, modelled according to the method set out in ‘Calculation of Road Traffic Noise’
Department of Transport, 1988. It is an approximate representation of the relative
noisiness of roads as sources, but does not indicate actual noise levels around roads,
which will depend on screening and other factors. For a typical noise map illustrating
how noise propagates, see Figure 14 below. For an explanation of the noise descriptor
used, see Appendix A2.