A bottom-up clustering approach to identify bus driving patterns and to develop bus driving cycles for Hong Kong.

Environmental Science and Pollution Research International
Hing Yan Tong, Ka Wai Ng

Abstract

Bus transport has been an important mode taking up a significant share of urban travel demand and thus the corresponding impacts on the environment are of great concerns. Use of driving cycles to evaluate the environmental impacts of buses has attracted much attention in recent years worldwide. The franchised bus service is currently playing important roles in the public transport system in Hong Kong; however, there is no driving cycle developed specifically for them. A set of bus driving cycle was therefore developed using a bottom-up approach where driving data on the bus network with mixed characteristics were collected. Using the Ward's method for clustering, the collected data were then categorized into three clusters representing distinct franchised bus route patterns in Hong Kong. Driving cycles were then developed for each route pattern including (i) congested urban routes with closely spaced bus stops and traffic junctions; (ii) inter-district routes containing a number of stop-and-go activities and a significant portion of smoother high speed driving; and (iii) early morning express routes and mid-night routes connecting remote residential areas and urban areas. These cycles highlighted the unique low-speed and aggres...Continue Reading

References

Dec 15, 2015·The Science of the Total Environment·Prasenjit AdakSuresh Pandian Elumalai
Nov 6, 2018·Journal of the Air & Waste Management Association·Yen-Lien T NguyenNgoc-Dung Bui
May 13, 2020·Environmental Science and Pollution Research International·Xuan ZhaoHao Chen

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