Wichuda Satiennam

Motorcycle On-Road Driving Parameters Influencing Fuel Consumption and Emissions on Congested Signalized Urban Corridor

This study aims to find the on-road driving parameters influencing 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 profile, emissions, and fuel consumption, by the second. The test motorcycles were driven by 30 sample motorcyclists on a signalized urban corridor in Khon Kaen City, Thailand, 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. The on-road driving parameter influencing fuel consumption and emissions was then determined. Results revealed that proportion of idle time significantly influenced 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 influence.

Development of on Board Motorcycle System to Measure on Road Driving Pattern

This study developed an onboard system to measure on road driving pattern for a motorcycle. The main components of the developed system consist of a magnetic wheel speed sensor for measuring speed of the motorcycle and a data logger. The developed data logger consists of a microcontroller, memory storage and data display panel for processing and recording the on road speed-time data. The developed system was validated to measure and correctly record speed per time interval. The developed onboard system will be applied by installing on driven motorcycles for recording a speed-time data that will be used to develop the motorcycle driving cycle.

Effects of Speed Bumps and Humps on Motorcycle Speed Profiles

In developed countries, the use of speed humps and bumps have evolved from extensive research and testing which been properly designed and standardized. On the contrary in developing countries, no systematic and scientific studies have been carried out on that environment, especially the study on the effects that the motorcyclists response to the humps and bumps. This study therefore reveals the riders behavior when negotiating their speed to the devices. A case study was conducted in the provincial cities of Thailand where the motorcycle was a major mode of transportation. Six locations with speed humps and bumps were selected. Vehicles passing times were simultaneously recorded at 12 points along each traffic calmed link. From these data, a speed profile for each individual vehicle and for a link could be derived. It is found that speed humps and bumps have critically different impacts on motorcycle rider and passenger car driver. The smaller size speed bumps could effectively control the rider speed but have diverse impacts on the driver. These speed differences could post more safety deficiency to the site. The effect of the device on riders behavior, however, is restricted to a short spatial range (about 20-30 m before and after the device). For the speed humps, the motorcycle speeds are quite varied depending mainly on the road terrain. It is found that the motorcyclists have significant lower acceleration rate on the upgrade terrain when compared to the passenger car. Therefore, it is important to take all these rider characteristics into considerations when design the road humps to control vehicle speed in the developing countries.

A Study of Potential Electric Motorcycle Use to Support a Low Carbon Society: Case of a Developing Asian City

The objective of this study is to explore the potential for electric motorcycles to support a developing Asian city to be a low carbon society. The study surveyed the attitudes of motorcyclists to determine the proportion of motorcyclists willing to use an electric motorcycle and also estimated the reduction of CO2 emission from the transport sector in Khon Kaen city, Thailand. The approach Bottom-Up2 by road network with the transport demand forecasting model and emission factors by vehicle type were used to calculate CO2 emissions for each road link. 16% of motorcyclists currently using gasoline motorcycles would be willing to use electric motorcycles in the near future. To evaluate CO2 emission reduction, the future condition with introduced electric motorcycles was compared to the future do-nothing condition in the same future year. The evaluation result reveals that the electric motorcycle introduction could reduce 2.4% of CO2 emitted by the transport sector from the future do-nothing condition.

The determinants of motorcyclists helmet use: Urban arterial road in Khon Kaen City, Thailand

INTRODUCTION Currently, Thailand incurs the highest death toll of motorcyclists in the world. The aim of this study was to explore the factors influencing helmet use of motorcyclists in Khon Kaen City, Thailand by using the Logistic regression analysis. METHOD The samples, consisting of 27,977 riders and 6,947 riding passengers, were collected by CCTV installed at several signalized intersections along urban arterial roads. RESULTS The observation results reveal that only 67% of motorcyclists wore the helmets. The analysis results reveal that the helmet use of motorcyclists was significantly associated with the riding status, number of passengers, apparent age, motorcycle class, time of day, the presence of police booths at intersections and, especially, red light running behavior. The riders tended to wear helmets at 2.7 times higher rates than passengers. Adult motorcyclists tended to wear the helmets at 2.8 times higher rates than children. The motorcyclists riding the motorcycles over 125 cc tended to wear the helmets 1.9 times higher than those riding motorcycles under 125 cc. The motorcyclists riding in the morning and the afternoon tended to wear the helmets 5.0 and 3.8 times higher than in the evening. The motorcyclists riding through intersections with police booths tended to wear the helmets 2.2 times higher than those riding through intersection without police booths. However, the red light running riders intend to wear the helmets 0.6 times less than the legal riders. CONCLUSIONS The outcome of this study could determine the factors influencing motorcyclists helmet use. PRACTICAL IMPLICATIONS It will be useful for a development of 100% helmet use program designed to lessen the fatality of motorcyclists along the urban arterial roads.

Willingness to pay for mortality risk reduction for traffic accidents in Myanmar

The dramatic increase in vehicle ownership in Myanmar over the past few years has resulted in an alarming increase in traffic accidents. Thus, road safety at the national level needs to be improved urgently in order to reduce the costs associated with traffic accidents and to assist policy makers in making economically efficient resource allocation decisions for road safety improvements. This research was conducted to determine the costs related to fatality risk reductions using a willingness to pay (WTP) approach for motorcyclists, car drivers, and bus passengers in Myanmar. Face-to-face interviews with contingent valuation (CV) and a payment card questionnaire approach was employed for the data collection; multiple linear regression analyses were conducted to determine the factors influencing WTP. The resulting median and mean for the value of statistical life (VSL) were found to be MMK 118.062 million (US

PW 0609 Effects of a speed camera project by automatic speed enforcement system on an urban arterial road at khonkaen city, thailand

98,385) to MMK 162.854 million (US

PW 2344 Preliminary evaluation of helmet law enforcement by cctv camera: case of phatumuang intersection, khon kaen city, thailand

135,712), respectively. Therefore, the total cost of death was estimated to range from MMK 594.681 billion (US

Development of On-Road Exhaust Emission and Fuel Consumption Models for Motorcycles and Application through Traffic Microsimulation

495.567 million) to MMK 820.296 billion (US

Development of an Onboard System to Measure the On-road Driving Pattern for Developing Motorcycle Driving Cycle in Khon Kaen City, Thailand

683.580 million) in 2015. In addition, the WTP was found to be significantly associated with age, family status, education, occupation, individual income, household income, the vehicle used, exposure to traffic, drunk driving, personal experiences, and the perceived risk of traffic accidents. This study might be helpful in prioritization of road safety related projects to get greatest benefit by choosing most cost effective projects. This study might assist the decision-making for road safety budget allocations and policy development.