scholarly journals Threshold Determination for Sharing Bus Rapid Transit–Exclusive Lanes with Conventional Buses

2019 ◽  
Vol 11 (17) ◽  
pp. 4592
Author(s):  
Yue ◽  
Chen ◽  
Yang ◽  
Ye

Sharing bus rapid transit (BRT) exclusive lanes with conventional buses is being considered to solve the problem of low utilization rate of BRT-exclusive lanes. However, the quantitative conditions and threshold that determine when to share need to be study. This paper took the common section of BRT and conventional bus lines as its research object. Practical investigation was conducted to analyze shared characteristics from multiple perspectives and explore influencing factors and mechanisms for sharing implementation. Based on the survey results, analytical models were established to quantify the influencing factors from three perspectives of road section, intersection, and bus stop. We selected departure volume of conventional buses as a threshold index and then summarized the constraints and the calculation process of sharing threshold. Finally, numerical examples of different scenarios were used to verify the feasibility and effectiveness of the method. The operation efficiency of the road section on exclusive lanes was the constraint on the lower limit of the shared threshold, while the upper limit was constrained by queuing probability or bus operation time under different intersections and stop spacing, which can provide reference for the shared setting of exclusive bus lanes.

Mathematics ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 625
Author(s):  
Cheng ◽  
Zhao ◽  
Zhang

The purpose of this study is to create a bi-level programming model for the optimal bus stop spacing of a bus rapid transit (BRT) system, to ensure simultaneous coordination and consider the interests of bus companies and passengers. The top-level model attempts to optimize and determine optimal bus stop spacing to minimize the equivalent costs, including wait, in-vehicle, walk, and operator costs, while the bottom-level model reveals the relation between the locations of stops and spatial service coverage to attract an increasing number of passengers. A case study of Chengdu, by making use of a genetic algorithm, is presented to highlight the validity and practicability of the proposed model and analyze the sensitivity of the coverage coefficient, headway, and speed with different spacing between bus stops.


Author(s):  
John P. Ernst

On February 1, 2004, a 12.9-km (8-mi) bus rapid transit (BRT) line began revenue operation in Jakarta, Indonesia. The BRT line has incorporated most of the characteristics of BRT systems. The line was implemented in only 9 months at a cost of less than US$1 million/km ($1.6 million/mi). Two additional lines are scheduled to begin operation in 2005 and triple the size of the BRT. While design shortcomings for the road surface and terminals have impaired performance of the system, public reaction has been positive. Travel time over the whole corridor has been reduced by 59 min at peak hour. Average ridership is about 49,000/day at a flat fare of 30 cents. Furthermore, 20% of BRT riders have switched from private motorized modes, and private bus operators have been supportive of expanding Jakarta's BRT. Immediate improvements are needed in the areas of fiscal handling of revenues and reconfiguring of other bus routes. The TransJakarta BRT is reducing transport emissions for Jakarta and providing an alternative to congested streets. The BRT provides a tangible vision for an effective, viable, and sustainable public transportation system in Jakarta and elsewhere.


2017 ◽  
Vol 12 (1) ◽  
pp. 43
Author(s):  
Wiwik Budiawan ◽  
Sriyanto Sriyanto ◽  
Inggriet Hermanda

Kecelakaan merupakan masalah yang belum terselesaikan di jalan raya. Hal ini dibuktikan dengan semakin banyaknya jumlah korban kecelakaan yang ada dijalan raya, walaupun jumlah kecelakaannya yang terjadi setiap tahunnya menurun namun jumlah korbannya berbanding terbalik dengan jumlah kecelakaan yang terjadi. Salah satu yang menyebabkan hal ini terjadi adalah angkutan – angkutan yang dapat mengangkut banyak orang, salah satunya Bus Rapid Transit (BRT). Faktor yang sangat berpengaruh terhadap kecelakaan yang tinggi adalah Driver error, dimana tingkat kewaspadaan yang rendah menyebabkan pengemudi tidak fokus mengemudi. Tingkat kewaspadaan dapat diukur menggunakan software Psychomotor Vigilance Test (PVT) Hal yang dapat mengurangi tingkat kewaspadaan adalah kualitas tidur yang rendah yang dapat diukur menggunakan kuisioner  Pittsburgh Sleep Quaity Index (PSQI). Selain kualitas tidur faktor lain yang mempengaruhi tingkat kewaspadaan adalah distraksi, yang dapat diukur menggunakan kuisioner Susceptibility to Driver Distraction Questinnaire (SDDQ). Kedua faktor ini akan dihubungkan dengan tingkat kewaspadaan menggunakan regresi  linier majemuk. Hasil penelitian menunjukkan bahwa tingkat kewaspadaan dipengaruhi oleh kualitas tidur sebelum pengemudi bekerja, sedangkan sesudah bekerja tingkat kewaspadaan dipengaruhi distraksi.AbstractAccident is a problem that not finish yet at the road. This fact can be evidence by the increasing of number victim’s accident at the road. Although number of accidents are decrease every years but the number of victims are increased. One type of vehicle in the road is public transportation that can accommodate many people. That’s way public transportation can make many victims if an accident. One type of public transportation in Semarang is Bus Rapid Transit (BRT). Driver error is a factor for increased number of accident, vigilance extent for driver error has an influence with accident in the road. If the driver has a low level of vigilance can make driver not focused on driving. Level of vigilance can be measured by software Psychomotor Vigilance Test (PVT). Factors that can make vigilance level for driver decreased are quality of sleep and distraction. Quality of sleep can measured by   Pittsburgh Sleep Quality Index (PSQI) questionnaire. Then Distraction for driver can be measured by Susceptibility to Driver Distraction Questionnaire (SDDQ). Both of these factors will be linked to the level of vigilance using linear regression. The results showed that the level of inattention is affected by the quality of the driver's sleep before work, after work while the level of vigilance is affected distraction.


CICTP 2017 ◽  
2018 ◽  
Author(s):  
Hua-Wei Gong ◽  
Wen-Zhou Jin ◽  
Xiao-Dong Zang ◽  
Qiang Luo

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Ji-hua Hu ◽  
Jia-xian Liang

Interstation travel speed is an important indicator of the running state of hybrid Bus Rapid Transit and passenger experience. Due to the influence of road traffic, traffic lights and other factors, the interstation travel speeds are often some kind of multi-peak and it is difficult to use a single distribution to model them. In this paper, a Gaussian mixture model charactizing the interstation travel speed of hybrid BRT under a Bayesian framework is established. The parameters of the model are inferred using the Reversible-Jump Markov Chain Monte Carlo approach (RJMCMC), including the number of model components and the weight, mean and variance of each component. Then the model is applied to Guangzhou BRT, a kind of hybrid BRT. From the results, it can be observed that the model can very effectively describe the heterogeneous speed data among different inter-stations, and provide richer information usually not available from the traditional models, and the model also produces an excellent fit to each multimodal speed distribution curve of the inter-stations. The causes of different speed distribution can be identified through investigating the Internet map of GBRT, they are big road traffic and long traffic lights respectively, which always contribute to a main road crossing. So, the BRT lane should be elevated through the main road to decrease the complexity of the running state.


2014 ◽  
Vol 42 (1) ◽  
pp. 2-15
Author(s):  
Johannes Gültlinger ◽  
Frank Gauterin ◽  
Christian Brandau ◽  
Jan Schlittenhard ◽  
Burkhard Wies

ABSTRACT The use of studded tires has been a subject of controversy from the time they came into market. While studded tires contribute to traffic safety under severe winter conditions by increasing tire friction on icy roads, they also cause damage to the road surface when running on bare roads. Consequently, one of the main challenges in studded tire development is to reduce road wear while still ensuring a good grip on ice. Therefore, a research project was initiated to gain understanding about the mechanisms and influencing parameters involved in road wear by studded tires. A test method using the institute's internal drum test bench was developed. Furthermore, mechanisms causing road wear by studded tires were derived from basic analytical models. These mechanisms were used to identify the main parameters influencing road wear by studded tires. Using experimental results obtained with the test method developed, the expected influences were verified. Vehicle driving speed and stud mass were found to be major factors influencing road wear. This can be explained by the stud impact as a dominant mechanism. By means of the test method presented, quantified and comparable data for road wear caused by studded tires under controllable conditions can be obtained. The mechanisms allow predicting the influence of tire construction and variable operating conditions on road wear.


2017 ◽  
Vol 15 (1) ◽  
pp. 33
Author(s):  
Ummu Kalsum ◽  
M.Yamin Jinca

Fenomena suburbanisasi yang terjadi di kota Makassar mendorong terciptanya pusat-pusat aktivitas baru di kawasan pinggiran dan menimbulkan berbagai masalah baru, seperti masalah transportasi. Penelitian ini menjelaskan arah perkembangan kota di wilayah suburban, karakteristik pergerakan, kondisi pelayanan angkutan massal dan menemukan strategi pengembangan transportasi angkutan massal. Proses pengumpulan data dilakukan melalui observasi lapangan dan wawancara, kemudian dianalisis menggunakan mapping analysis, deskriptif kuantitatif, komparasi dan SWOT untuk menemukan strategi pengembangan. Hasil studi menunjukkan bahwa kota berkembang ke arah  Timur dan Selatan serta tidak sesuai dengan hierarki jalan. Disamping itu masyarakat suburban dominan melakukan perjalanan 5 kali dalam seminggu dengan waktu tempuh berkisar 30 menit. Pelayanan angkutan massal menggunakan bus (Bus Rapid Transit) masih rendah karena halte masih sulit dijangkau meskipun biaya penggunaannya sangat terjangkau dan memberikan kenyamanan lebih dibanding angkutan massal lainnya. Oleh karena itu diperlukan strategi pengembangan konsep transportasi yang bersifat mikro dan adaptif untuk diterapkan.


2016 ◽  
Vol 6 (3) ◽  
pp. 123-134 ◽  
Author(s):  
Yohen Cuéllar ◽  
Rodrigo Buitrago Tello ◽  
Luis Carlos Belalcazar Ceronn

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