Travel data collection has always been considered as a fundamental part of all transport planning studies, and there has been a continuous effort to employ new approaches in order to increase the accuracy of collected data and reflect the real behaviour of individuals. Many approaches have been utilized for performing travel surveys, but there are still significant areas for improvement, as they need considerable financial and human resources, have an insufficient time-coverage and mostly engage respondents considerably, which sometimes implies biased results. This paper introduces a research framework, which is focused on using innovative technology of smartphones to develop a practical and accurate travel survey approach and better understand the pattern of individualrs travel behaviour. The first section of this paper is devoted to reviewing previous studies and methods of GPS assisted travel surveys. Then after reviewing available data collection approaches, the appropriate approach to increase the accuracy of collected data and also reduce the burden on respondents has been employed. In the next step, ATLAS Project, an iPhone application which has been developed specifically for travel data collection is introduced and the procedure of designing, developing and employing of this application is explained.
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