Soft launch and fieldwork monitoring for transport SP surveys
Soft launch and fieldwork monitoring for transport SP surveys A soft launch - collecting 5–10% of your sample before opening fully - catches problems early...
Articles tagged:transport
Testing attribute levels in transport SP surveys
Testing attribute levels in transport SP surveys Attribute levels that are too narrow produce insufficient variation; levels that feel unrealistic disengage respondents. Testing levels before...
Building a combined RP/SP survey in SurveyEngine
Building a combined RP/SP survey in SurveyEngine A combined RP/SP survey collects both revealed and stated preference data from the same respondents. The survey design...
Implementing pivot designs with variable piping in SurveyEngine
Implementing pivot designs with variable piping in SurveyEngine Pivot designs are technically demanding to implement. The reference data must be collected, stored, computed, and displayed...
Recruiting hard-to-reach transport populations for SP studies
Recruiting hard-to-reach transport populations for SP studies Many transport studies require populations that standard online panels cannot adequately represent - freight shippers, regular cyclists, rural...
Recruiting commuters for transport mode choice SP studies
Recruiting commuters for transport mode choice SP studies Commuter samples need careful definition - commuting by what mode, how often, over what distance? Correct sourcing...
Planning a value of travel time study
Planning a value of travel time study VoTT studies have specific design requirements that differ from other DCE applications. Getting the scope, design, and recruitment...
DCE evidence in transport cost-benefit appraisal
DCE evidence in transport cost-benefit appraisal Transport infrastructure decisions worth billions depend on DCE-derived estimates of the value of travel time. This article explains how...
Value of travel time estimation from DCE data
Value of travel time estimation from DCE data Value of travel time is one of the most important outputs of transport SP research - and...
RP/SP joint estimation in Apollo
RP/SP joint estimation in Apollo Joint RP/SP estimation combines the anchoring power of real behaviour with the variation power of stated preference tasks. Apollo handles...
Why use a DCE for transport research?
Why use a DCE for transport research? Transport policy analysis requires monetary values for time savings, reliability, and comfort. DCEs are the standard method for...
Stated preference vs revealed preference in transport research
Stated preference vs revealed preference in transport research What people say vs. what they do. Stated preference (SP) data captures hypothetical choices, revealed preference (RP)...
Pivot designs in transport mode choice research
Pivot designs in transport mode choice research Generic SP attribute levels feel unrealistic to respondents making real travel decisions with specific costs and times. Pivot...
Best-worst scaling in transport research
Best-worst scaling in transport research Best-worst scaling produces relative importance rankings across a large attribute set with less respondent burden than a DCE. It does...
RP/SP consistency checks in transport DCE studies
RP/SP consistency checks in transport DCE studies In combined RP/SP transport studies, inconsistencies between revealed and stated preference data reveal respondents who are not engaging...
Diurnal activity checks for transport SP survey fraud detection
Diurnal activity checks for transport SP survey fraud detection When do genuine transport survey respondents complete surveys? Not at 3am. Unusual completion timing is one...