Threshold Research on the Elderly Pedestrian Ratio in Pedestrian Crossing Speed Setting on Signalized Crosswalks in China

  • Huiling Zhang Chongqing Jiaotong University
Keywords: pedestrian crossing speed, elderly pedestrian ratio, regression model, threshold, Vissim simulation

Abstract

Inadequate consideration of the elderly people crossing demand on the signalized intersections would bring great potential safety hazards, especially the speed through the crosswalk. By observing the pedestrian walking speed at three signalized crosswalks and a relatively spacious sidewalk in Chongqing, China, this paper has obtained the walking speed values of 658 elderly people and 1,176 adults at the signalized crosswalks, as well as the walking speed parameters of 868 adults and 422 elderly people on a relatively spacious sidewalk section. Comparing the walking speed of adults walking along the sidewalk section and on signalized crosswalks, the data show that there is no significant difference between these two site speeds. Similarly, when comparing the two site data of the elderly, it is found that their walking speed at the signalized crosswalk is significantly higher than that on the sidewalk section. That is to say, the speed setting for the old people crossing the crosswalk has not been fully considered. Subsequently, taking the elderly’s walking speed as input parameter, establishing the simulation models under different proportions of the elderly and different pedestrian flows, and then gain the walking speed values of the pedestrians with different quantities and different proportion of the elderly pedestrians. With the help of the unknown breakpoint Regression method, under the setting of the elderly pedestrian speed crossing the street, the proportion threshold of the elderly crossing the street at the signalized intersection is obtained. The results show that when the proportion of the elderly is more than 15% of the pedestrians crossing the street, the pedestrian crossing speed value for the signal time is suggested to be 0.97 m/s.

Author Biography

Huiling Zhang, Chongqing Jiaotong University
Dr Huiling Zhang, School of Transportation, Chongqing Jiaotong University, Chongqing, China

References

Melorose J, Perroy R, Careas S. World population prospects. United Nations. 2015;1(6042): 587-92.

National Bureau of Statistics of the People's Republic of China. China statistical yearbook; 2018. Available from: http://www.stats.gov.cn/tjsj/

Dündar S. Analysis of pedestrian crossing speed – the case of Istanbul. Proceedings of the Institution of Civil Engineers - Municipal Engineer. 2017;170(1): 29-37.

Coffin A, Morrall J. Walking Speeds of Elderly Pedestrians at Crosswalks. Transportation Research Record. 1995;1487: 63-67.

Fildes BN, Lee SJ, Kenny D, Foddy W. Survey of older road users: Behavioural and travel issue. Monash University Accident Research Centre, Report No. 57, 1994.

Bernhoft IM, Carstensen G. Preferences and behavior of pedestrians and cyclists by age and gender. Transportation Research Part F. 2008;11(2): 83-95.

Knoblauch RL, Ietrucha MTP, Nitzburg M. Field Studies of Pedestrian Walking Speed and Start-Up Time. Transportation Research Record, Journal of the Transportation Research Board. 1996;1538(1): 27-38.

Xiong H, Lv J, Jiang X, et al. Pedestrian Walking Speed, Step Size, and Step Frequency from the Perspective of Gender and Age: Case Study in Beijing, China. Transportation Research Board Meeting; 2007.

Oxley J, Fildes B, Ihsen E, Day R, Charlton J. Investigation of road crossing behaviour of older pedestrians. Monash University Accident Research Centre, Report No. 81, 1995.

Gates T, Noyce D, Bill A, Van Ee N. Recommended Walking Speeds for Timing of Pedestrian Clearance Intervals Based on Characteristics of the Pedestrian Population. Transportation Research Record, Journal of the Transportation Research Board. 1982;1: 38-47.

Webb EA, Bell S, Lacey RE, Abell JG. Crossing the road in time: Inequalities in older people's walking speeds. Journal of Transport & Health. 2017;5: 77-83.

Diaz AJA. Analysis of pedestrian walking speed for traffic engineering design and operations. University of Manitoba, 2008.

Transportation Research Board. Highway Capacity Manual 2000. Washington D. C.: TRB, National Research Council; 2000.

Trpkovic A, Milenkovic M, Vujanic M, et al. The Crossing Speed of Elderly Pedestrians. Promet – Traffic&

Transportation. 2017;29(2): 175-183.

Milazzo II JS, Rouphail NM, Hummer JE, Allen DP. Quality of Service for Uninterrupted-Flow Pedestrian Facilities in Highway Capacity Manual 20001. Transportation Research Record. 1999;1678: 18-24.

Industry standard of the People’s Republic of China (CJJ37-2012). Code for design of urban road engineering, 2016.

Muggeo VM. Estimating regression models with unknown break-points. Statistics in Medicine. 2003;22(19): 3055-3071.

Shanno DF. Conditioning of quasi-Newton methods for function minimization. Mathematics of Computation. 1970;24(111): 647-656.

Yuan YX. A Modified BFGS Algorithm for Unconstrained Optimization. IMA Journal of Numerical Analysis. 1991;11(3): 325-332.

Published
2020-02-06
How to Cite
1.
Zhang H. Threshold Research on the Elderly Pedestrian Ratio in Pedestrian Crossing Speed Setting on Signalized Crosswalks in China. Promet [Internet]. 2020Feb.6 [cited 2024Oct.15];32(1):55-3. Available from: http://traffic.fpz.hr/index.php/PROMTT/article/view/3110
Section
Articles