Pub Date : 2024-03-21DOI: 10.46610/jots.2024.v09i01.003
Guru Sharan Mishra
The current paper outlines a comprehensive methodology for modeling speed data on two-lane roads during periods of heavy traffic characterized by heterogeneous vehicle types. In such scenarios, the presence of diverse vehicle types causes a significant departure from the normal speed distribution model. This deviation becomes particularly pronounced during heavy traffic flows due to the frequent interactions among vehicles within the traffic stream. Consequently, there arises a necessity to develop a modeling approach specifically tailored to such flow conditions. Drawing upon empirical data collected from a major intercity road in India, this study uncovers a notable skewness in speed data under heavy traffic conditions. This skewness primarily stems from the formation of vehicle platoons within the traffic stream, exerting a substantial influence on their speed characteristics. By scrutinizing the distribution of this data, the study concludes that a logarithmic transformation effectively aligns with the assumption of normality. This assertion is supported by various goodness-of-fit metrics, affirming the suitability of the proposed modeling approach for capturing the intricacies of speed behavior in heterogeneous traffic environments.
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Pub Date : 2024-02-27DOI: 10.46610/jots.2024.v09i01.002
Fatima Akter Dina, Md. Hossain Manik, Saifullah Mahmud
The dynamic capital of Bangladesh, Dhaka, has been confronted with a major challenge in the form of a high volume of traffic accidents, with as many as 1640 incidents recorded in just five years. Nevertheless, this number probably underestimates the actual severity of the issue, suggesting that there is a more urgent problem at hand. The consequences of these accidents reach deep into the city's economic and societal framework, leading to lower productivity, taxing healthcare systems, and causing psychological trauma to communities. The study also highlights the alarming issue of drug addiction among certain Bangladeshi drivers, which increases the frequency of traffic accidents. The Bangladesh Child Rights Forum has brought attention to the significant increase in child mortality resulting from these incidents, highlighting the need for comprehensive measures to protect children's safety when driving. To sum up, the report emphasizes how critical it is for everyone to work together to create a safer Dhaka, one in which the threat of traffic accidents disappears and the city may grow without constant fear.
{"title":"\"Urban Road Accident Scenarios in Dhaka Metropolitan Area \"","authors":"Fatima Akter Dina, Md. Hossain Manik, Saifullah Mahmud","doi":"10.46610/jots.2024.v09i01.002","DOIUrl":"https://doi.org/10.46610/jots.2024.v09i01.002","url":null,"abstract":"The dynamic capital of Bangladesh, Dhaka, has been confronted with a major challenge in the form of a high volume of traffic accidents, with as many as 1640 incidents recorded in just five years. Nevertheless, this number probably underestimates the actual severity of the issue, suggesting that there is a more urgent problem at hand. The consequences of these accidents reach deep into the city's economic and societal framework, leading to lower productivity, taxing healthcare systems, and causing psychological trauma to communities. The study also highlights the alarming issue of drug addiction among certain Bangladeshi drivers, which increases the frequency of traffic accidents. The Bangladesh Child Rights Forum has brought attention to the significant increase in child mortality resulting from these incidents, highlighting the need for comprehensive measures to protect children's safety when driving. To sum up, the report emphasizes how critical it is for everyone to work together to create a safer Dhaka, one in which the threat of traffic accidents disappears and the city may grow without constant fear.","PeriodicalId":510586,"journal":{"name":"Journal of Transportation Systems","volume":"31 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140427192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As the population of Dhaka is growing very rapidly, the sustainable transport strategy of Dhaka should try to preserve and expand the modal share of pedestrians, which accounts for the majority of all short trips made however unfortunately pedestrian zones are probably the most neglected and underutilized in Dhaka transportation system. This study focuses on assessing pedestrian behaviour at crosswalks. The basic relationship between flow – energy – densities was analyzed and analyzed in Dhaka. A video recording technique was used at the four study sites to observe pedestrian characteristics such as flow and movement. These data were used to simulate mathematical models yielding the aforementioned relationships. A decision coefficient, R2, was calculated to obtain the best fit for each relationship. The results of this study were compared with those of other studies. Finally, Level of Service (LOS) restrictions for pedestrians on the sidewalks were defined. Our Study area was Notun Bazar, Badda, and Gulshan-1 & Gulshan-2. At each location, we collected data from 150 meters and divided it into 3 portions. In the Notun Bazar sidewalk, the width is 6 feet, and the total number of passing people in 60 minutes is 1870 nos. total obstacle is 5nos. On the Notun Bazar sidewalk, the width is 10 feet, total number of passing people in 60 minutes is 4570nos. In the Gulshan-2 sidewalk, the width is 19.5 feet, total number of passing people in 60min is 1112 nos. We obtained the Notun Bazar and Badda Link Road for the Pedestrian Level of Service categories. E. Gulshan- 2 the Pedestrian Level of Service D. Gulshan 1 the pedestrian level of service C. Badda & Notun Bazar has the worst scenario among our four selected locations. There are temporary shops and electric poles in the middle of the sidewalk. It reduces the speed of the pedestrians. So, Sidewalk should be free to increase LOS. Traffic management is one of the best things we can do to improve the LOS. Gulshan 01 is an example for us as it has an automated traffic management system. Gulshan 02 sidewalks have temporary bus counters which also reduce the speed of pedestrians.
随着达卡人口的快速增长，达卡的可持续交通战略应努力保持和扩大行人的出行比例，因为行人占所有短途出行的大多数，但遗憾的是，行人区可能是达卡交通系统中最被忽视和利用率最低的区域。本研究的重点是评估行人在人行横道上的行为。研究分析了达卡人流-能量-密度之间的基本关系。在四个研究地点使用了视频记录技术来观察行人的特征，如流量和移动情况。这些数据被用于模拟产生上述关系的数学模型。通过计算判定系数 R2，得出每种关系的最佳拟合值。这项研究的结果与其他研究的结果进行了比较。最后，确定了人行道上行人的服务水平（LOS）限制。我们的研究区域是诺顿巴扎尔、巴达、古尔善-1 和古尔善-2。我们在每个地点收集了 150 米长的数据，并将其分为 3 部分。在诺顿巴扎人行道上，宽度为 6 英尺，60 分钟内通过的总人数为 1870 人，总障碍物为 5 个。在诺顿巴扎人行道上，宽度为 10 英尺，60 分钟内过往总人数为 4570 人。古尔山 2 号人行道的宽度为 19.5 英尺，60 分钟内通过的总人数为 1112 人。我们获得了 Notun Bazar 和 Badda Link Road 的行人服务等级类别。E. Gulshan- 2 的行人服务等级 D. Gulshan 1 的行人服务等级 C. Badda 和 Notun Bazar 在我们选定的四个地点中情况最差。人行道中间有临时商店和电线杆。这降低了行人的速度。因此，人行道应保持畅通，以提高 LOS。交通管理是改善 LOS 的最佳方法之一。Gulshan 01 就是一个例子，因为它有一个自动交通管理系统。鼓山 02 区的人行道设有临时公交车站，这也降低了行人的速度。
{"title":"Evaluation of Pedestrians’ Level of Service (LOS) at Some Selected Sidewalks of Dhaka","authors":"Subrata Roy, Mominul Haque Rakib, Md Sahinur Rahman, Sazia Parvez Supit, Mst. Kanij Fatema","doi":"10.46610/jots.2024.v09i01.001","DOIUrl":"https://doi.org/10.46610/jots.2024.v09i01.001","url":null,"abstract":"As the population of Dhaka is growing very rapidly, the sustainable transport strategy of Dhaka should try to preserve and expand the modal share of pedestrians, which accounts for the majority of all short trips made however unfortunately pedestrian zones are probably the most neglected and underutilized in Dhaka transportation system. This study focuses on assessing pedestrian behaviour at crosswalks. The basic relationship between flow – energy – densities was analyzed and analyzed in Dhaka. A video recording technique was used at the four study sites to observe pedestrian characteristics such as flow and movement. These data were used to simulate mathematical models yielding the aforementioned relationships. A decision coefficient, R2, was calculated to obtain the best fit for each relationship. The results of this study were compared with those of other studies. Finally, Level of Service (LOS) restrictions for pedestrians on the sidewalks were defined. Our Study area was Notun Bazar, Badda, and Gulshan-1 & Gulshan-2. At each location, we collected data from 150 meters and divided it into 3 portions. In the Notun Bazar sidewalk, the width is 6 feet, and the total number of passing people in 60 minutes is 1870 nos. total obstacle is 5nos. On the Notun Bazar sidewalk, the width is 10 feet, total number of passing people in 60 minutes is 4570nos. In the Gulshan-2 sidewalk, the width is 19.5 feet, total number of passing people in 60min is 1112 nos. We obtained the Notun Bazar and Badda Link Road for the Pedestrian Level of Service categories. E. Gulshan- 2 the Pedestrian Level of Service D. Gulshan 1 the pedestrian level of service C. Badda & Notun Bazar has the worst scenario among our four selected locations. There are temporary shops and electric poles in the middle of the sidewalk. It reduces the speed of the pedestrians. So, Sidewalk should be free to increase LOS. Traffic management is one of the best things we can do to improve the LOS. Gulshan 01 is an example for us as it has an automated traffic management system. Gulshan 02 sidewalks have temporary bus counters which also reduce the speed of pedestrians.","PeriodicalId":510586,"journal":{"name":"Journal of Transportation Systems","volume":"769 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140474748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pedestrian safety is a paramount concern on our roadways, as pedestrians are inherently vulnerable when navigating traffic. In Bulgaria, this research underscores the necessity of prioritizing pedestrian safety in roadway design and traffic control measures. The study's core objective was to analyze pedestrian crossing behaviour and identify optimal locations for pedestrian crossings to enhance overall road safety. A notable finding of the study was the significant influence of crosswalk type on pedestrian crossing speeds. Pedestrians were observed to cross streets more rapidly at signalized crosswalks, highlighting the efficacy of traffic control devices in regulating pedestrian movements. Moreover, the study delved into the influence of age and gender on pedestrian crossing speeds. It revealed that children and adult pedestrians were the fastest groups in terms of crossing speeds, while elderly pedestrians exhibited notably slower speeds. Notably, at non-signalized crosswalks, adult females were the slowest demographic, both in comparison to adult males and in comparison, to both male and female children. In a broader context, the study unveiled that male pedestrians, on the whole, demonstrated significantly faster crossing speeds than their female counterparts. These findings provide valuable insights for road planners and policymakers in Bulgaria, aiming to create safer and more efficient road systems that cater to the unique needs of pedestrians while considering the various factors that influence their crossing behaviours.
{"title":"Analysis of Pedestrian Crossing Speed at Signalized and Non-Signalized Crosswalk: A Case Study of Central Station to Str. Tzar Osvobotiel Road of Ruse City","authors":"Sudeep Thapa, Mitko Dimitrov Marinov, Srijan Subedi Chowi","doi":"10.46610/jots.2023.v08i03.004","DOIUrl":"https://doi.org/10.46610/jots.2023.v08i03.004","url":null,"abstract":"Pedestrian safety is a paramount concern on our roadways, as pedestrians are inherently vulnerable when navigating traffic. In Bulgaria, this research underscores the necessity of prioritizing pedestrian safety in roadway design and traffic control measures. The study's core objective was to analyze pedestrian crossing behaviour and identify optimal locations for pedestrian crossings to enhance overall road safety. A notable finding of the study was the significant influence of crosswalk type on pedestrian crossing speeds. Pedestrians were observed to cross streets more rapidly at signalized crosswalks, highlighting the efficacy of traffic control devices in regulating pedestrian movements. Moreover, the study delved into the influence of age and gender on pedestrian crossing speeds. It revealed that children and adult pedestrians were the fastest groups in terms of crossing speeds, while elderly pedestrians exhibited notably slower speeds. Notably, at non-signalized crosswalks, adult females were the slowest demographic, both in comparison to adult males and in comparison, to both male and female children. In a broader context, the study unveiled that male pedestrians, on the whole, demonstrated significantly faster crossing speeds than their female counterparts. These findings provide valuable insights for road planners and policymakers in Bulgaria, aiming to create safer and more efficient road systems that cater to the unique needs of pedestrians while considering the various factors that influence their crossing behaviours.","PeriodicalId":510586,"journal":{"name":"Journal of Transportation Systems","volume":"18 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139185966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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