01595657

Component

This research comprehensively investigates influential factors affecting people’s travel mode choices for their shopping trips. The data on travel for grocery shopping were derived from the 2012 Utah Travel Survey, with 1,294 respondents sampled from Salt Lake County, Utah. 61.75% of the respondents drove alone to their grocery stores, whereas 32.46% selected carpooling and the rest chose other modes, including walking, biking, and riding public transit. Correlation analysis and multinomial logit models (MNL) were used to estimate the associations between individual socioeconomic characteristics, accessibility variables, and household and store built-environments and mode choices of shopping trips. Taking seven different spatial scales into account, the characteristics of built-environments in the neighborhoods around both households and stores were thoroughly measured. Results show that strong predictors of walking or riding public transit to the grocery store were age, household composition (the number of household members), vehicle ownership, household annual income, land use mix, street density, and distance to the central business district. The association between different built-environment factors and shopping-trip travel mode choice was sensitive to geographic scales. The straight-line buffer was a good indicator for the sales amount, the network buffer was suitable for the household built-environment factors, and the census block and block group scales were apt for the store built-environment factors. Future studies of urban grocery shopping trips should consider the role played by geographic scales in analyzing the effects of built-environment factors and store characteristics on the travel mode choice.

This paper was sponsored by TRB committee ADB10 Standing Committee on Traveler Behavior and Values. Alternate title: Grocery Shopping: Geographic Scale Matters in Analyzing the Effects of the Built Environment on Choice of Travel Mode.

01584066

16-6203

English

19p

2016

Transportation Research Board 95th Annual Meeting

Digital/other

Figures; References; Tables

Built environment; Mode choice; Multinomial logits; Shopping trips; Spatial analysis; Travel surveys

Grocery shopping; Scale effects

Salt Lake County (Utah)

Highways; Pedestrians and Bicyclists; Planning and Forecasting; Public Transportation

Transportation Research Board Annual Meeting 2016 Paper #16-6203

TRIS, TRB, ATRI

Jan 12 2016 6:44PM