Optimal Measurement Interval for Pedestrian Traffic Flow Modeling
Publication: Journal of Transportation Engineering
Volume 137, Issue 12
Abstract
Measurement interval is crucial in obtaining stable traffic flow parameters, such as traffic flow rate, density, and speed. Credible relationships among these parameters and reasonable capacity for analysis are also dependent on the appropriate measurement interval. Nevertheless, the measurement interval has not been mentioned explicitly in most previous studies related to pedestrian traffic flow. Different researchers adopted various time intervals for traffic flow parameters measurement, and the reasons for the choice of a certain measurement interval were usually not clearly stated. This paper deals with the impact of different intervals on the results of pedestrian traffic flow parameters counting and the methods to determine the appropriate measurement interval. It takes pedestrian traffic in Shanghai Metro stations into an observation context. By video recording, pedestrian traffic parameters, including volume and density, are extracted manually through recording tapes using an initial 5-s interval for level passageway, ascending stairway, descending stairway, and two-way stairway. Taking 5 s as the basic incremental unit, traffic parameters for 10-s interval, 15-s interval, and other analogical time interval values are acquired in sequence. On the basis of the principles of measurement interval selection, the appropriate measurement interval is determined by comparing its influence on stability of hourly flow rate and invariability of pedestrian traffic status when applying different time interval values. It is revealed that a 30-s interval value is optimal for all the observed facilities in this research context. From the analysis of optimal measurement interval, it could also be inferred that traffic stability of level passageway is higher than that of stairways, and a one-way stairway is more stable than a two-way stairway. The collected data, proposed methods, and revealed pedestrian flow characteristics could be helpful in improving the theories on pedestrian traffic flow, and serve as valuable references for similar pedestrian context studies.
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Acknowledgments
This research is supported by National High Technology Research and Development Program of China (863 Program) named “Technology of design for rapid public transit system in metropolis (2006AA11Z202)”. The authors also give thanks especially to Shanghai ShenTong Metro Co., Ltd for the aid of survey and provision of some useful recordings in metro stations.
References
Al-Masaeid, H. R., Al-Suleiman, T. I., and Nelson, D. C. (1993). “Pedestrian speed-flow relationship for central business district areas in developing countries.” Transportation Research Record 1396, Transportation Research Board, Washington, DC, 69–74.
Banks, J. H. (1999). “Investigation of some characteristics of congested flow.” Transportation Research Record 1678, Transportation Research Board, Washington, DC, 128–134.
Daly, P. N., McGrath, F., and Annesley, T. J. (1991). “Pedestrian speed/flow relationships for underground stations.” Traffic Eng. Control, 32(2), 75–78.
Fang, Z., and Yuan, J. (2007). “An investigation of the pedestrian density and travel speed for a railway station.” Fire Sci. Technol., 26(1), 12–15.
Fruin, J. J. (1987). Pedestrian planning and design, Elevator World, Mobile, AL.
Gerilla, G. P., Hokao, K., and Takeyama, Y. (1995). “Proposed level of service standards for walkways in metro Manila.” J. Eastern Asia Soc. Transp. Stud., 1(3), 1041–1060.
Hall, F. L. (2007). “Traffic Stream Characteristics.” Chapter 2, Revised Monograph on Traffic Flow Theory, Technical Rep. Prepared for Federal Highway Administration, 〈http://www.tfhrc.gov/its/tft/tft.htm〉, (Mar. 8, 2011).
Han, M. (2007). Possibility theory and mathematics statistics, Tongji University, Shanghai, China.
Lee, J. Y. S., and Lam, W. H. K. (2003). “Levels of service for stairway in Hong Kong underground stations.” J. Transp. Eng., 129(2), 196–202.
Milazzo, J. S., II, Rouphail, N. M., and Hummer, J. E. (1999). “Quality of service for uninterrupted pedestrian facilities in the 2000 highway capacity manual.” TRB 1999 Annual Meeting CD-ROM, Transportation Research Board, Washington, DC.
Older, S. J. (1968). “Movement of Pedestrians on Footways in Shopping Streets.” Traffic Eng. Control, 10, 160–163.
Polus, A., and Shwartzman, Y. (1999). “Flow characteristics at freeway work zones and increased deterrent zones.” Transportation Research Record 1657, Transportation Research Board, Washington, DC, 18–23.
Pushkarev, B. S., and Zupan, J. M. (1975). Urban space for pedestrians, MIT Press, Cambridge, MA.
Rong, J., Chang, C., and Liu, X. (1999). “The minimum statistical intervals chosen for the traffic models calibration.” J. Beijing Polytech. Univ., 25(4), 49–55 (in Chinese).
Sarkar, A. K., and Janardhan, K. S. V. S. (2001). “Pedestrian flow characteristics at an intermodal transfer terminal in Calcutta.” World Transport Pol. Pract., 7(1), 32–38.
Smith, B. L., and Ulmer, J. M. (2003). “Freeway traffic flow rate measurement: Investigation into impact of measurement time interval.” J. Transp. Eng., 129(3), 223–229.
Tanaboriboon, Y. and Guyano, J. A. (1989). “Level of service standards for pedestrian facilities in Bangkok: A case study.” ITE J., 59(11), 39–41.
Transportation Research Board (TRB) (1997). Highway capacity manual 2000, Washington, DC.
Virkler, M. R., and Elayadath, S. (1994). “Pedestrian speed-flow-density relationships.” Transportation Research Record 1438, Transportation Research Board, Washington, DC, 51–58.
Ye, J., Chen, X., Yang, C., and Wu, J. (2008). “Walking behavior and pedestrian flow characteristics for different types of walking facilities.” Transportation Research Record 2048, Transportation Research Board, Washington, DC, 43–51.
Zhou, M., and Hall, F. L. (1999). “Investigation of speed-flow relationship under congested conditions on a freeway.” Transportation Research Record 1678, Transportation Research Board, Washington, DC, 64–72.
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© 2011 American Society of Civil Engineers.
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Received: Feb 1, 2010
Accepted: Apr 7, 2011
Published online: Apr 11, 2011
Published in print: Dec 1, 2011
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