The Journal of The Korea Institute of Intelligent Transport Systems (한국ITS학회 논문지)

The Korea Institute of Intelligent Transport Systems (한국ITS학회)
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Testing the Reliability of a Smartphone-Based Travel Survey: An Experiment in Seoul

스마트폰 기반 통행 행태 조사 자료 신뢰성 검증: 서울에서 수집된 자료를 바탕으로

  • Lee, Jae Seung (Hongik University) ;
  • Zegras, P. Christopher (Massachusetts Institute of Technology, Department of Urban Studies and Planning) ;
  • Zhao, Fang (Singapore-MIT Alliance for Research and Technology, Future Urban Mobility Group) ;
  • Kim, Daehee (Hongik University) ;
  • Kang, Junhee (Hongik University)
  • 이제승 (홍익대학교 도시공학전공) ;
  • ;
  • ;
  • 김대희 (홍익대학교 도시공학전공) ;
  • 강준희 (홍익대학교 도시계획과)
  • Received : 2016.03.17
  • Accepted : 2016.04.16
  • Published : 2016.04.30
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Abstract

With programmable applications that utilize sensors, such as global positioning systems and accelerometers, smartphones provide an unprecedented opportunity to collect behavioral data in an unobtrusive and cost-effective manner. This paper assesses the relative accuracy and reliability of the Future Mobility Sensing (FMS), a smartphone-based prompted-recall travel survey. We compared the data extracted from FMS with the data collected from the Korea Passenger Trip Survey (PTS), a traditional self-reported, paper-based travel survey. In total, 46 undergraduate students completed the PTS for seven consecutive days, while also carrying their smartphones with the activated FMS applications for the same time span. After completing the PTS, the participants validated their FMS data on the web-based prompted recall surveys. We then matched the validated FMS data with the PTS-based records. The FMS turns out to be superior in detecting short trips, which are usually under-reported in self-reported travel surveys. The reported PTS travel times are longer than for the FMS, suggesting that participants tend to overestimate their travel time in the PTS. This study contributes to the ongoing development of smartphone-based travel behavior data collecting methods.

현재 스마트폰은 GPS와 가속도계를 비롯한 센서를 이용하여 인간 행동 자료를 인간의 행동을 간섭하지 않으며 비용을 절감해서 수집할 가능성을 열어주고 있다. 본 연구는 스마트폰 기반 설문 조사의 정확성과 신뢰성을 평가하였다. 스마트폰을 이용하여 수집한 자료와 가구통행실태조사를 기본으로 구성된 전통적인 종이 설문을 이용한 자료를 비교하였다. 46명의 학생이 스마트폰을 이용하여 7일간 통행 기록을 수집하였고, 같은 기간 동안 종이 설문을 수행하였다. 참여자들은 웹페이지를 통해 스마트폰으로 수집된 자신의 통행 기록을 검증하였다. 검증된 스마트폰 자료는 같은 날에 수집된 종이 설문자료와 매칭되었다. 스마트폰 기반 자료는 종이 설문자료보다 짧은 통행을 기록하는 데 효과적이었다. 통행 자료의 통행시간이 종이 자료의 통행시간보다 짧은 경향이 나타났다. 이는 기존의 종이 설문 참여자가 통행시간을 과대평가하는 경향이 있음을 시사한다. 본 연구 결과는 스마트폰 기반의 통행 자료 수집 시스템을 발전시키는 데 이바지할 것이다.

Keywords

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