34 research outputs found
A STUDY ON THE INTRODUCTION OF BUS RAPID TRANSIT SYSTEM IN ASIAN DEVELOPING CITIES
No full textBus Rapid Transit (BRT) has increasingly become an attractive urban transit alternative in many Asian developing cities due to its cost-effective and flexible implementation. However, it still seems to be difficult to introduce BRT to these cities because almost all of their city structures have been developed under solely a road transport development city plan and weakness of land use control gives rise to many problems, such as urban sprawl, traffic congestion, and air pollution. The purpose of this study was to introduce several strategies to support BRT implementation in Asian developing cities, such as a strategy to appropriately integrate the paratransit system into BRT system as being a feeder along a BRT corridor to supply demand. These proposed strategies were evaluated by applying demand forecasting and emission models to the BRT project plan of Bangkok Metropolitan Administration (BMA) in Thailand. It was demonstrated that the proposed strategies could effectively improve the BRT ridership, traffic conditions, and air pollution emission of the entire system in Bangkok. This study could be further extended to include strategy recommendation if a BRT system were to be introduced to other Asian developing cities
Study of low energy Ytterbium atom-ion charge transfer collisions using a surface-electrode trap
Get PDFThesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2008.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Includes bibliographical references (p. 113-114).We demonstrate a new isotope-selective system to measure low energy charge transfer collisions between ytterbium ions and atoms in the range of collisional energy from 2.2x 10-5 eV to 4.3x 10-3 eV, corresponding to effective temperature from 250 mK to 50 K. The charge transfer collisions are observed by spatially overlapping the 172yb+ ions in the surface-electrode trap and 174Yb atoms in the magneto-optical trap, and measuring ion loss. We confirm that, in the Langevin regime, the charge transfer collisional rate is independent of the collisional energy. The measured Langevin cross section is consistent with a theoretical value for the ytterbium atomic polarizability of 143 a.u., as calculated by Zhang and Dalgarno [1].by Thaned Pruttivarasin.S.B
Potential for modal shift by passenger car and motorcycle users towards Bus Rapid Transit (BRT) in an Asian developing city
No full textAbstractMany developing Asian cities consider a Bus Rapid Transit (BRT) system in their public transport planning because of its advantages, offering lower investment cost and flexible implementation over rail systems. The objective of this research is to assess the potential of BRT for attracting travelers from passenger cars and motorcycles. Three different BRT systems were designed for the main corridor passing through Khon Kaen City in Thailand. The study developed modal split models for predicting the choices of passenger car users and motorcycle users. The models were developed based on a Stated Preference (SP) survey. It was found that BRT could attract significantly private vehicle users to change mode choice. The proportion of motorcycle users shifting is higher than passenger car users. However, the majority of private vehicle users still prefer their own private vehicles. Both travel time and travel cost affects the mode choice, in which travel time has a highly significant effect on passenger car users' choice of BRT, but travel cost has a highly significant effect on motorcyclists' choice. Some socio-economic factors, including gender, age, driving license holding and residence location also influence the choice of BRT
Development of an onboard system to measure the on-road driving pattern for developing motorcycle driving cycle in Khon Kaen city, Thailand
No full textAbstractThis study developed an onboard system to measure the on-road driving pattern for a motorcycle driving cycle in Khon Kaen city, Thailand. The developed system, validated with high accuracy results, could measure and record a driving pattern, i.e. a speed profile of a driving motorcycle. The selected motorcycle was driven along selected routes in Khon Kaen city under the existing traffic conditions to collect the on-road driving pattern. The Khon Kaen motorcycle driving cycle (KMDC) was developed by a repetitive algorithm using the principle of least total variance in the target parameters. The developed KMDC was compared with the existing motorcycle driving cycles for Bangkok and other cities. The result reveals that the KMDC is different from those of other cities
Cross-cultural Differences in Speeding Intentions of Drivers on Urban Road Environments in Asian Developing Countries
Get PDFThe aim of this study was to examine and
compare the psychological factors influencing driver speeding behavior in 3
cities in Southeast Asia, focusing on developing counties, using the Theory of
Planned Behaviour (TPB). Data was collected from 570 respondents in the urban
areas of Khon Kaen in Thailand, Vientiane in Laos and Phnom Penh in Cambodia.
The psychological factors of TPB include attitude (AT), subjective norm (SN)
and perceived behavioral control (PBC). These factors were employed to explain
speeding intentions in urban road environments. The Structural Equation Models
(SEM) was used to examine and explain speeding intentions. The results
indicated that the TPB could explain the variance by intentions of drivers in
Khon Kaen, Vientiane and Phnom Penh at 33%, 46%, and 84%, respectively. The most significant of the
psychological factors for Khon Kaen drivers was determined by AT, while the
speeding intentions of Vientiane drivers and Phnom Penh drivers were determined
by PBC. From this data, the authorities of each city should create and
implement safety policies that can improve these psychological factors, which
could have a positive effect on drivers’speeding intentions in urban road
environments. The outcome of this study could be useful for understanding the
speeding attitudes of drivers in three different countries and would be
beneficial for the development and introduction of preventative safety measures
in these countries as well
Track-quality index and degradation of railway track structure: The construction track doubling project of northeast line from thanon chira junction to khon kaen station, Thailand
Get PDFIn the past, the railway network has not been developed, and new construction added has been
mostly degraded caused by long useful life, and lack of maintenance due to a budget constraint. Currently,
93% of railway in Thailand is single track which results in delays due to low capacity and low average speeds,
delayed train on a single track will also delay the train passing it. In some areas of the network, the amount
of travel and transportation exceeds the capacity received, so delays in travel and transportation is quite high.
Due to this above reason, the service of railway is not effective in terms of convenience and speed of service.
Punctuality and cost is high compared with road transport. The biggest challenge that railways faces is the
insufficient number of tracks and outdated or old trains. Most the trains cannot travel at their optimum speed
because they do not get clearances on time. Thai government has a policy to develop railway track network
and services to improve transportation efficiency and save fuel energy used in the transportation sector of the
country. Thus, it is necessary to develop the rail transportation system from the existing network as a single
track to the current double track network. This study focuses on investigating the degradation of the existing
railway structure during the construction track doubling Project. Data were inspected by Track Inspection Car
EM120N before the commencement of construction for analysing the condition with the Track Quality Index
/ TQI) in order to predict the degradation of the railway to plan maintenance and further renewal of the
railway. The study found that the TQI value of the existing track structure during the two years of the doubling
track construction (2017-2018) has changed significantly
PW 0609 Effects of a speed camera project by automatic speed enforcement system on an urban arterial road at khonkaen city, thailand
No full textTrack-quality index and degradation of railway track structure: The construction track doubling project of northeast line from thanon chira junction to khon kaen station, Thailand
No full textIn the past, the railway network has not been developed, and new construction added has been
mostly degraded caused by long useful life, and lack of maintenance due to a budget constraint. Currently,
93% of railway in Thailand is single track which results in delays due to low capacity and low average speeds,
delayed train on a single track will also delay the train passing it. In some areas of the network, the amount
of travel and transportation exceeds the capacity received, so delays in travel and transportation is quite high.
Due to this above reason, the service of railway is not effective in terms of convenience and speed of service.
Punctuality and cost is high compared with road transport. The biggest challenge that railways faces is the
insufficient number of tracks and outdated or old trains. Most the trains cannot travel at their optimum speed
because they do not get clearances on time. Thai government has a policy to develop railway track network
and services to improve transportation efficiency and save fuel energy used in the transportation sector of the
country. Thus, it is necessary to develop the rail transportation system from the existing network as a single
track to the current double track network. This study focuses on investigating the degradation of the existing
railway structure during the construction track doubling Project. Data were inspected by Track Inspection Car
EM120N before the commencement of construction for analysing the condition with the Track Quality Index
/ TQI) in order to predict the degradation of the railway to plan maintenance and further renewal of the
railway. The study found that the TQI value of the existing track structure during the two years of the doubling
track construction (2017-2018) has changed significantly
A study of speed limits and speed control measures for the urban arterial road
No full textSpeed limits in accordance with environment and road functions have been used as a fundamental tool for speed management and road safety. This paper presents literatures review of speed limits measure and results from the study on speed limits problem and driver attitude toward the speed limit and speed control measure. Area of study is on the arterial road where the Mittaprab Highway passed through Khon Kaen City. The study found that improper designation of road functions is the main cause of complexity and difficulty on safety management. It suggests more researches on speed limit setting methods to accommodate the road conditions of the country. In order to increase effectiveness of speed limits measure, this paper suggests transportation-related authorities to classify this area to be the urban arterial road, to set proper speed limits, and to modify the road environment in accordance with its function. More measures to enhance speed limit effectiveness and to reduce accident are included automatic speed control devices, speed limits warning signs, and advertisement signs to use the bypass route. These could enhance the effective speed management program
TRAFFIC ACCIDENTS IN THAILAND
No full textThis paper presents an overview of traffic accident situations in Thailand. It highlights the transformation of road accident problems in Thailand, from the past to present, with the focus on the situation of the most accident prone mode of transport in the country, motorcycle accidents. Relating problems and contributing causes of motorcycle accidents are also detailed in this paper. Subsequently, this paper recommends several measures to curb the alarming increases in motorcycle accidents
