Research Article Motorcycle On-Road Driving Parameters Influencing Fuel Consumption and Emissions on Congested Signalized Urban Corridor Atthapol Seedam, 1 Thaned Satiennam, 1 Thana Radpukdee, 1 Wichuda Satiennam, 1 and Vatanavongs Ratanavaraha 2 1 Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Tailand 2 School of Transportation Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Tailand Correspondence should be addressed to Taned Satiennam; sthaned@kku.ac.th Received 21 January 2017; Accepted 12 March 2017; Published 9 May 2017 Academic Editor: Jose E. Naranjo Copyright © 2017 Atthapol Seedam et al. Tis is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Tis study aims to fnd the on-road driving parameters infuencing fuel consumption and emissions of motorcycle driving on a congested signalized urban corridor. A motorcycle onboard measurement system was developed to measure instantaneously and continuously record on-road driving data, including speed-time profle, emissions, and fuel consumption, by the second. Te test motorcycles were driven by 30 sample motorcyclists on a signalized urban corridor in Khon Kaen City, Tailand, to collect their on-road driving behavior during the morning peak period. Cluster analysis was applied to analyze collected driving data and to categorize the drivers by level of fuel consumption and on-road driver behavior. Te on-road driving parameter infuencing fuel consumption and emissions was then determined. Results revealed that proportion of idle time signifcantly infuenced fuel consumption and emissions of motorcycle driving on a congested signalized urban corridor, though aggressive driving behavior, hard acceleration and deceleration, did not have the same kind of infuence. 1. Introduction Te number of motorcycles in many motorcycle-dominated countries presently has increased rapidly. Te motorcycles have the largest share, accounting for more than 90% of the road transport feet in Hanoi, Vietnam [1]. Te number of registered motorcycles increased to 20 million vehicles, representing 56% of all vehicles in Tailand [2]. Tis high demand has increased fuel consumption and is a direct cause of a large amount of air pollution emissions. Te Asian Development Bank, ADB [3], reported that the MC feet emitted about 54% of CO and hydrocarbon (HC) pollution at roadside in Hanoi. Wang et al. [4] estimated that motorcycles emitted approximately 45.0% of the Volatile Organic Compounds (VOC) and approximately 36.3% of the Particulate Matter (PM) of the total emissions from vehicles in Shanghai, China. In India, Sahu et al. [5] estimated that motorcycles emitted approximately 37% of the total emissions from carbon monoxide (CO) in on-road transport. Fukuda et al. [6] found that, compared with passenger cars, motorcycles consumed fuel and emitted approximately 30% and 27% of carbon dioxide (CO 2 ), respectively, in Khon Kaen City, Tailand. Tus, fuel consumption and emissions from motorcycles in developing cities are problems that need immediate action. World Conference on Transport Research Society [7] pro- posed the CUTE matrix, introducing three strategies, includ- ing AVOID, SHIFT, and IMPROVE, to reduce fuel consump- tion and emissions from the transport sector. Te researchers in motorcycle-dominated countries have proposed measures according to this matrix, including AVOID (e.g., on-road ecodriving behavior), SHIFT (e.g., shif to public transport) [8], and IMPROVE (e.g., improving motorcycle conformance to the EURO3 standard (Oanh et al., 2012), as well as changing motorcycles to electric motorcycles [9]). On-road ecodriving behavior has been reported to reduce fuel consumption and Hindawi Journal of Advanced Transportation Volume 2017, Article ID 5859789, 6 pages https://doi.org/10.1155/2017/5859789