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Estimating Spatial Interdependence in Automobile Type Choice with Survey Data

UCD-ITS-RP-10-21

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Sustainable Transportation Energy Pathways (STEPS)

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Suggested Citation:
Adjemian, Michael K., C.-Y. Cynthia Lin Lawell, Jeffrey Williams (2010) Estimating Spatial Interdependence in Automobile Type Choice with Survey Data. Transportation Research Part A 44 (9), 661 - 675

In this article, we show that vehicle type ownership is spatially dependent at both the regional and household-level even after controlling for income and population density. We discuss reasons for the existence of spatial effects in vehicle ownership, and note potential implications for policymakers. Our results point to the importance of spatial relationships in transportation research and highlight the hazards of ignoring their role in affecting transportation outcomes. For example, if vehicle type choice is affected by neighborhood spillovers, agencies that regulate traffic flow and road safety could tailor their choice projections and policy tools to account for such interdependence.