1,720,979 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
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
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insufficient number of tracks and outdated or old trains.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
INTRODUCTION OF SIGNAL CONTROL STRATEGY FOR NEARSIDE BUS STOP TO IMPROVE BUS OPERATION ALONG TWO-LANE ARTERIAL
No full textCross-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
PW 0609 Effects of a speed camera project by automatic speed enforcement system on an urban arterial road at khonkaen city, thailand
No full textA 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
An evaluation of speed limit measure: A case of the Mittraphap highway passing through Khon Kaen city
No full textThe objective of this study is to evaluate the speed control measure on the arterial road of Khon Kaen city. The 60 km/hr speed limit was posted on the urban arterial since 2012. To reveal the existing conditions, this study analyzed the accident data, speed data and enforcement data. Driver’s and government officer’s attitudes toward the existing speed control measures are captured through the questionnaires survey and interview processes, respectively. The study results reveal that under the existing road environment, the drivers disagree with the posted 60 km/h speed limit and it cannot be enforced by the police. However, 1-year of speed control program significantly reduces the number of traffic injuries and fatalities. Spot speed study revealed that most of drivers reduced their speed once they saw the police with the radar gun. 86% of drivers agree with the speed control measure and 93% of drivers aware that driving speed is related to safety. Therefore, to support the existing speed control measure, this study suggests that the responsible authorities should consider and study for the suitable speed limit for the area and modify the road geometries accordingly. Besides, installing automatic speed enforcement devices, and continuing public campaign directly to the risk groups could also increase the effectiveness of the program
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Factors Influencing the Real-World Electricity Consumption of Electric Motorcycles
No full textCurrently, studies regarding the factors influencing the real-world electricity consumption of electric motorcycles are lacking. The objective of this study was to examine the factors influencing the real-world electricity consumption of electric motorcycles when driving along an uncongested road network. This study developed an onboard measurement device to collect on-road data, including instant speed data and electricity consumption, from the test electric motorcycle while it was driving on a real-world road. Overall, 105 participants (n = 105) drove the test motorcycle along the uncongested urban road network. Multiple linear regression analysis was applied to explore the effect of influencing variables on the electricity consumption of electric motorcycles. The analysis results revealed that the rider’s weight and average running speed positively influenced electricity consumption, whereas decelerating time negatively influenced electricity consumption. Noticeably, the rider’s weight affected electricity consumption more than other factors. The lightweighting of electric motorcycles was mainly recommended to lower electricity consumption. Subsequently, CO2 emissions from electricity generation could be reduced
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