You may be interested the following papers:
Todd Litman (2007), Build for Comfort, Not Just Speed: Valuing
Service Quality Impacts In Transport Planning, Victoria Transport
Policy Institute (<http://www.vtpi.org/>www.vtpi.org); at
<http://www.vtpi.org/quality.pdf>www.vtpi.org/quality.pdf.
Todd Litman (2008), "Valuing Transit Service Quality Improvements,"
Journal of Public Transportation, Vol. 11, No. 2, Spring 2008, pp.
43-64; at
<http://www.nctr.usf.edu/jpt/pdf/JPT11-2Litman.pdf>www.nctr.usf.edu/jpt/pdf/JPT11-2Litman.pdf;
a more complete version is
at <http://www.vtpi.org/traveltime.pdf>www.vtpi.org/traveltime.pdf.
They discuss the value of incorporating quantitative factors
(convenience, comfort and security) in planning and project
evaluation, and recommend a methodology using multi-modal
Level-of-Service ratings to adjust unit travel time values. Please
let me know if you have comments or questions. I would be very
interested to hear how this compares with other methodologies that you find.
Best wishes,
-Todd Litman
At 02:24 AM 9/17/2008, Pedro Abrantes wrote:
>ITS Leeds is currently carrying out the following reviews of
>existing demand modelling work, respectively, for UKTram and the
>Department for Transport:
>
>* Meta Analysis of Quantitative Research on Quality Attributes
>(UKTram). This will focus on studies which have attempted to value
>'soft factors', either as catch-all mode-specific constants or by
>trying to disaggregate further the effect of individual attributes.
>We aim to compile a database of available evidence and to identify
>and explain common features as well as variations between studies.
>
>* Further Meta Analysis of Values of Time and Elasticities
>(DfT). This builds on previous work by prof Mark Wardman and will
>attempt to explain variations in fuel, fare, time, headway and other
>non-fare elasticities across studies as a function of GDP, time,
>income, travel distance, trip purpose, methodology, etc. We're
>looking for studies that attempted to estimate any of the following parameters:
>
> * Values of in-vehicle, wait, walk, headway or any
> other forms of time (since 2000)
>
> * Fare/cost elasticities for rail, bus or car modes
> (since 1997)
>
> * Non-fare elasticities for rail, bus or car modes (any year)
>
>All the information collected will go into an existing 'pot' for
>analysis and is treated anonymously. The intention is that the
>results of both these studies will be of assistance to analysts and
>decision-makers working in demand forecasting and transport appraisal.
>
>The first stage of this work is to identify relevant demand studies
>and possible contacts who may have access to project reports and
>model results. If you feel you can help I'd be very keen to hear from you.
>
>Best regards,
>
>Pedro Abrantes
>
>Lecturer in Public Transport
>
>Institute for Transport Studies, University of Leeds
>
>Leeds LS2 9JT
>
>Tel.: 0113 34 35344, Email: [log in to unmask]
><mailto:[log in to unmask]>
>
>
Sincerely,
Todd Alexander Litman
Victoria Transport Policy Institute (www.vtpi.org)
[log in to unmask]
Phone & Fax 250-360-1560
1250 Rudlin Street, Victoria, BC, V8V 3R7, CANADA
"Efficiency - Equity - Clarity"
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