Department of Civil and Environment Engineering, Amirkabir University of Technology, Tehran, Iran
Abstract
Nowadays, transportation is a basic requirement for citizens which causes many traffic and health problems. According to a number of problems raising by motorized vehicle usage, transportation planners are trying to persuade people to use active transportation modes such as walking. Therefore, it is important to investigate the effective factors on choosing, frequency and duration of walking. This paper reviews the effective factors on the tendency of citizens to walk more on their daily trips. Studies showed that there are four main effective factors including socio-economic characteristics (e.g., gender, age, income, and vehicle car ownership), trip characteristics (e.g., distance, and time of trip), environment factors (e.g., density, diversity, design, destination accessibility, and distance to transit), and subjective factors (e.g., attitudes, and perceptions). According to literature this paper shows that environmental and subjective factors are found as the most effective ones. Therefore, it could be suggested planners consider these two factors simultaneously in their policy making. Further investigations depict that there is a research gap in walking studies that suggests researchers to more concentrate on different trip purposes, simultaneous study of above mentioned fac-tors, especially in developing context.