[sustran] Re: Road building
Roger Higman
rogerh at foe.co.uk
Mon Jul 31 00:34:28 JST 2000
> I am urgently looking for material that will establish the
> point that additional road building does not really help in
> the long run since the additional traffic that it generates
> soon clogs the new roads as well as the old one.
The classic UK reference is:
Standing Advisory Committee on Trunk Road Assessment "Trunk Roads and the Generation of Traffic" December 1994 (London: HMSO)
This found that: "the economic value of a scheme can be overestimated by the omission of even a small amount of induced traffic".
It said induced traffic is "of greatest importance in the following circumstances:
- where the network is operating or is expected to operate close to capacity;
- where traveller responsiveness to changes in travel times or costs is high, as may occur where trips are suppressed by congestion and then released when the network is
improved;
- where the implementation of a scheme causes large changes in travel costs."
Roger Higman
Senior Campaigner (Climate and Transport)
Friends of the Earth (E,W+NI),
26-28 Underwood Street,
London, N1 7JQ
Tel + 44 171 566 1661 Fax + 44 171 490 0881
Pager 07654 663772
E-mail rogerh at foe.co.uk http://www.foe.co.uk
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