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DYNAMICS. WP3: STATED PREFERENCE PROGRESS REPORT. Accent Marketing and Research and Hague Consulting Group (1994) Bovy and Bradley (1985) Bradley, Marks and Wardman (1986) Transportation Planning Associates (1990) Hague Consulting Group and Accent Marketing and Research (1999).

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DYNAMICS

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DYNAMICS

WP3: STATED PREFERENCE

PROGRESS REPORT


Accent Marketing and Research and Hague Consulting Group (1994)

Bovy and Bradley (1985)

Bradley, Marks and Wardman (1986)

Transportation Planning Associates (1990)

Hague Consulting Group and Accent Marketing and Research (1999)

SP STUDIES OF ROUTE CHOICE


Hague Consulting Group and Accent Marketing and Research (1999)

Johnston, Bates and Roberts (1989)

Preston and Wardman (1991)

SP STUDIES OF DEPARTURE TIME CHOICE


Context

Presentation

Alternatives

Attributes

Response

Analysis

ASSESSMENT


Context: two surveys, one for drivers of light vehicles (split into vehicles using whole of route and vehicles using part of route), and the other for commercial vehicle operators.

For light vehicles that could use whole of route:

Presentation: self-completion survey, provided with map, initial approach at service station or interception on road.

Alternatives: four.

Attributes: time spent in congested conditions, time spent in uncongested conditions, petrol costs and toll costs (if applicable).

Response: ranking.

Analysis: exploded logit.

e.g. TPA (1990)


Car drivers and passengers survey

Context: three core questionnaires (motorway users, trunk road users, urban road users).

Presentation: self-completion questionnaires given to car drivers and passengers at filling stations at different locations throughout the country.

Alternatives: two.

Attributes: departure time, travel time.

Response: choice.

Analysis: logit.

e.g. HCG AND ACCENT (1999)


Travel time in congestion

Travel time not in congestion

Trip length

Petrol cost

Toll cost

Quality improvements

Parking cost

VARIABLES IDENTIFIED AS RELEVANT TO ROUTE CHOICE


Travel time

Travel time variability

Parking cost

VARIABLES IDENTIFIED AS RELEVANT TO DEPARTURE TIME CHOICE


Presentation: combined route choice and departure time choice experiment, administered by self-completion questionnaire.

Alternatives: four.

Attributes: departure time, travel time, travel time variability, route, cost.

Response: ranking.

Analysis: exploded logit.

PROPOSALS FOR SP DESIGN


Traffic congestion on your usual route means that

there is an increase in travel time and/or travel

time variability. Do you:

Continue to make the usual journey at the usual time?

Change departure time but use the usual route?

Change route but depart at the usual time?

Switch to public transport or not travel at all?

BASIC QUESTION


POSSIBLE DESIGNS?


POSSIBLE DESIGNS?


Parking cost and availability

how does this enter?

Travel time variability

presentation

non-linearities

interaction effects

Travel time

time in free flow vs. time in congested conditions

(Non) variability of route and/or departure time choices

ISSUES


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