Abstract
This paper aims to examine the relationship between urban form and personal daily trips between urban zones across Metropolitan Shiraz, Iran. To cope with collinearity nature of trip generation determinants and also multicollinearity in model estimation, component principal analysis (PCA) was employed to identify latent dimensions of trip generation. Then, a multiple regression model with continuous independent variables was developed to measure the effect of each individual variable on entire trips generated among urban zones. The explanatory variables included both physical characteristics of the metropolitan (land use diversity, density, suburbanization, connectivity, and accessibility to public transport), and socio-economic characteristics of trip makers (age, employment status, education, migration, property value) aggregated on the urban zones scale. The empirical findings, based on ordinary least squares (OLS) estimation of 2006 data for 47 traffic area zones (TAZ) with total population over 1.1 million indicated that socio-economic characteristics were the most positive determinants of trip generation among the zones. On contrast, suburbanization (distance from central business district (CBD)) and distance from public transport facilities were negatively associated with the trip generation. However, other physical factors such as land use mix and network connectivity were found not important in influencing intra-zone trip generation, probably influencing inter-zone trip generation instead. In fact, improving local accessibility may reduce the need to intra-zonal travel, rather may also increase the tendency to travel within the neighborhood area.
Highlights
Background studiesIt is generally accepted that the urban form and its urban design quality do affect significantly the travel behaviors of residents, the extent and direction of the relationship remains uncertain (Cervero & Duncan, 2006; Handy 1996)
Trip generation is measured by the trip generation rate, defined by the daily sum of trip production and trip attraction in a traffic area zones (TAZ) divided by the total floor area of a TAZ in unit of trip numbers/100 square meters
Conclusions and further investigation This study reveals that socio-economic characteristics are most positive determinants of intrazone trip generation
Summary
Background studiesIt is generally accepted that the urban form and its urban design quality do affect significantly the travel behaviors of residents, the extent and direction of the relationship remains uncertain (Cervero & Duncan, 2006; Handy 1996). Much of the work has originated in either North America or Western Europe The majority of these studies conclude that urban physical characteristics, ranging from regional to local in scale, have an effect on travel patterns and the environmental impacts of transport such as emissions. The majority of former studies attempt to find out the influence of urban form factors on more than one response variable. They tend to focus on the relative significance of the explanatory variables on travel behaviour. Some claim that settlements with high density, mixed land use and high quality urban environment help to reduce vehicle trip generation but induce more sustainable form of travel such as walking and cycling. The focus is more on studies experienced in developing countries
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
