Why Do They Ride with Others? Meta-Analysis of Factors Influencing Travelers to Carpool

Lars E. Olsson, Raphaela Maier and Margareta Friman
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Lars E. Olsson: CTF Service Research Center, and Department of Social and Psychological Studies, Karlstad University, SE-65188 Karlstad, Sweden
Raphaela Maier: CTF Service Research Center, and Department of Social and Psychological Studies, Karlstad University, SE-65188 Karlstad, Sweden
Margareta Friman: CTF Service Research Center, and Department of Social and Psychological Studies, Karlstad University, SE-65188 Karlstad, Sweden

Sustainability, 2019, vol. 11, issue 8, 1-16

Abstract: Carpooling can be viewed as a simple intervention to reduce congestion, environmental problems, and land use for parking spaces. The present study assembled 18 studies on carpooling from all over the world that were published during the last five years (2014–2018) for a meta-analysis. By calculating effect sizes of 20 different factors, the study aimed to understand user characteristics, motives, and barriers to carpooling, and to gain insights about carpool interventions. Our results indicate that carpooling is very weakly related to socio-demographic variables, and that psychological factors are becoming more important, including monetary and time benefits, reducing congestion, and environmental concerns. Policy-makers can increase carpooling by offering cheaper parking or special parking spaces for carpoolers and introducing high-occupancy vehicle (HOV) lanes. Not surprisingly, fuel prices influence mode choice. The overall findings support previous results, but we found judgmental factors becoming more important for the choice to carpool. We conclude that carpooling services still fail to include many potential users and to serve users adequately. The challenge of meeting the needs of all users requires new approaches to designing carpool concepts, systems, and encounters.

Keywords: behavior; carpool; effect size; intervention; motivation; meta-analysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (23)

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