[sustran] Re: sustran-discuss V1 #677

[mnichols at baaqmd.gov]

One of the most important recent 
studies of "induced" traffic is:

Mark Hanson and Yuanlin Huang, "Road 
Supply and Traffic in California Urban 
Areas", Transportation Research, volume 
31A, No. 3, 1997, pp. 205-18.

Matt Nichols
Transportation Fund for Clean Air
Bay Area Air Quality Management 
District
mnichols at baaqmd.gov


Date: Sat, 29 Jul 2000 11:55:01 +0530 
From: Debi Goenka <debi at beag.net>
Subject: [sustran] Road building
     
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.
     
Case studies/reports from American cities would be most 
useful.
     
Any links to any websites would also be most useful.
     
Many thanks and cheers
     
Debi Goenka
- -- 
     
     
     
     
     
Debi Goenka                                         
Bombay Environmental Action Group
     
e-mail: debi at beag.net 
     
     
     
Environmental Education Office
     
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# 54, 2nd floor
Mumbai 400002
     
Tel:  91-22-2423126
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Date: Sun, 30 Jul 2000 08:22:24 -0700 
From: Todd Litman <litman at vtpi.org>
Subject: [sustran] Re: Road building
     
At 11:55 AM 07/29/2000 +0530, you wrote:
>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.
>
>Case studies/reports from American cities would be most 
>useful.
>
>Any links to any websites would also be most useful. 
>
>Many thanks and cheers
     
See our report "Generated Traffic; Implications for Transport Planning" 
posted at our website. A version of it is forthcoming in the ITE Journal 
(Intitute of Transportation Engineers). It summarizes a number of studies 
that show that under congested conditions, a major portion of additional 
road capacity is filled with additional vehicle traffic that would not 
otherwise occur, and that this can exacerbate other transportation 
problems, including downstream congestion, crashes, pollution and 
automobile dependency.
     
You may find some of our other reports useful too.
     
     
Sincerely,
     
Todd Litman, Director
Victoria Transport Policy Institute
"Efficiency - Equity - Clarity"
1250 Rudlin Street
Victoria, BC, V8V 3R7, Canada
Phone & Fax: 250-360-1560
E-mail:  litman at vtpi.org
Website: http://www.vtpi.org
     
------------------------------
     
Date: Sun, 30 Jul 2000 16:34:28 +0100 
From: Roger Higman <rogerh at foe.co.uk> 
Subject: [sustran] Re: Road building
     
     
> 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 Genera
on of Traffic" December 1994 (London: HMSO)
     
This found that: "the economic value of a scheme can be overestimated by the omi
ion 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, 
asmay 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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End of sustran-discuss V1 #677
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