access icon free Scene-based pedestrian safety performance model in mixed traffic situation

© The Institution of Engineering and Technology
Received 31/08/2011, Accepted 17/05/2013, Revised 26/03/2013, Published 14/01/2014

Compared to vehicle-only collisions, traffic collisions with pedestrians are studied less because of insufficient data. However, with the development of image processing technology, a growing number of road user behavioural analyses have been conducted using video data. This study tries to extract road users’ movements from video data in order to analyse the conflict between pedestrian and vehicle and to evaluate pedestrian safety performance during conflicts. The time difference to collision (TDTC) parameter is used to fit the safety analysis on pedestrian-involved conflicts. Scene-based analysis, which evaluates the safety performance of traffic intersections and segments where several pedestrian–vehicle conflicts may happen together, is conducted using 91 groups of scene data. The parameters most related to pedestrian safety are located using a sensitivity test, a quantitative definition of pedestrian–vehicle conflict is then defined, and a scene-based pedestrian safety performance evaluation model is built. The model can correctly detect nearly 94.4% of possibly dangerous traffic scenes. Other kinds of mixed traffic scenes can also be studied based on this research.

Inspec keywords: road safety; pedestrians; traffic engineering computing; image processing

Other keywords: pedestrian–vehicle conflict; scene-based pedestrian safety performance model; sensitivity test; TDTC parameter; traffic collisions; mixed traffic situation; traffic segments; vehicle-only collisions; traffic intersections; scene-based analysis; road user behavioural analyses; video data; time difference to collision parameter; quantitative definition; image processing technology; road user movements

Subjects: Optical, image and video signal processing; Traffic engineering computing; Computer vision and image processing techniques

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