en Health Health Original Research Original Research <p> <strong> Background </strong>:Traffic and transport is a substantial part of a range of economic, social and environmental factors distinguished to have impact on human health. This paper is a report on a preliminary section of a Health Impact Assessment (HIA) on urban traffic and transport initiatives, being conducted in Sanandaj, Iran. In this preliminary study, the psychometric properties of Urban Traffic related Determinants of Health Questionnaire (UTDHQ) were investigated. </p><p> <strong> Methods </strong>: Multistage cluster sampling was employed to recruit 476 key informants in Sanandaj from April to June 2013 to participate in the study. The development of UTDHQ began with a comprehensive review of the literature. Then face, content and construct validity as well as reliability were determined. </p><p> <strong> Results </strong>: Exploratory Factor Analysis showed optimal reduced solution including 40 items and 8 factors. Three of the factors identified were Physical Environment, Social Environment, Public Services Delivery and Accessibility. UTDHQ demonstrated an appropriate validity, reliability, functionality and simplicity. </p><p> <strong> Conclusion </strong>: Despite the need for further studies on UTDHQ, this study showed that it can be a practical and useful tool for conducting HIAs in order to inform decision makers and stakeholders about the health influences of their decisions and measures. </p> Urban traffic, Health Impact Assessment, Social Determinants of Health, Factor Analysis, Questionnaire, Psychometric Properties. 528 538 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-720&slc_lang=en&sid=1 Haidar Nadrian nadrian@razi.tums.ac.ir 200319475328460013056 200319475328460013056 No Department of Health Education and Promotion, School of Health and Health Research Institute, Tehran University of Medical Sciences, Tehran, Iran. Saharnaz Nedjat s_nt@gmail.com 200319475328460013057 200319475328460013057 No Department of Epidemiology and Biostatistics, School of Health, Knowledge Utilization Research Center, Tehran University of Medical Sciences, Tehran, Iran. Mohammad Hossein Taghdisi taghdisi_mh@gmail.com 200319475328460013058 200319475328460013058 No Department of Health Education and Promotion, School of Health, Iran University of Medical Sciences, Tehran, Iran. Davoud Shojaeizadeh shojaei5@yahoo.com 200319475328460013059 200319475328460013059 Yes Department of Health Education and Promotion, School of Health and Health Research Institute, Tehran University of Medical Sciences, Tehran, Iran.