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Stated Preference
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Throughout the 25 years that the Stated Preference
methodology has been in use, we have always been at the leading edge
of developments in the field, and today the company continues to
develop new techniques and innovative applications.
Pioneering SP work
In the early 1980s we realised that new data
collection techniques would be required to support the ambitious
travel
forecasting exercises
being considered by transport planners and policy makers. No longer
could the aggregate demand models of the past be relied on nor
could the costs of disaggregate revealed preferences models be
contemplated
on all studies. Indeed, policy tests were being considered for
which revealed preference data would be inappropriate. Our conclusion
was
that we should investigate the, at the time, novel Stated Preference
(SP) survey technique.
One of our first trials was for the Long Distance
Travel Study for the Dutch Government, which financed the data collection,
while
the design and analysis was funded from MVA’s own internal
research budgets. The SP results were integrated with the Revealed
Preference (RP) results in the Long Distance Model which we developed
for the Dutch Government. Since then we have carried out more than
100 SP studies gaining a deep understanding of the strengths (and
limitations) of the approach. In the Value of Time study (commissioned
by the UK Department of Transport), for example, we were the first
to compare and validate models developed on revealed and stated
preference data.
We have since carried out numerous studies
for government departments, public transport operators and the private
sector,
at an international
level, using SP techniques, in order to facilitate transport
demand and supply modelling. In conjunction with RP data they enabled
the assessment of public transport and highway schemes.
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