congestion problems
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2021 ◽  
Vol 16 (2) ◽  
pp. 30-47
Author(s):  
Dovydas Skrodenis ◽  
Donatas Čygas ◽  
Algis Pakalnis ◽  
Andrius Kairys

Planned special events (PSEs) attract more people than usual to specific areas, which leads to increased traffic flows and congestions on the roads. Roadwork zones are among the most vulnerable areas on the roads, where increased traffic can lead to congestion. In roadwork zones, the vehicle flow capacity is already lower than in the conventional situations without roadworks, but at the time of PSEs, these zones become difficult to pass if no attention is paid to the change of the traffic management scheme. This kind of events poses many threats for road authorities, thus, new traffic management systems should be considered. This paper analyzes 2 PSEs and one national celebration in Lithuania and a significant impact they have on the regular traffic flow. PSEs are taken into consideration as they attract traffic to a known place; however, national celebrations distort traffic along all roads and it is not known exactly, which roads will be congested the most. Since roadwork zones cause congestion problems even in conventional situations, this paper presents traffic capacity calculations at these road stretches during PSEs and considers how they change depending on the traffic management scheme.


2021 ◽  
Vol 20 ◽  
pp. 49-55
Author(s):  
Sabeen Tahir ◽  
Ghadah Abdullah Aldabbagh ◽  
Sheikh Tahir Bakhsh ◽  
Abass Md Said

Bluetooth is a widespread wireless technology standard for limited wireless networks that permits Bluetooth devices to create a one-hop (piconet) or multi-hop (scatternet) network. During data transmission, a large number of links passing through a single master or bridge device may create congestion problems in a Bluetooth network. Therefore, routing in a multi-hop dynamic Bluetooth network, where a number of routing masters and routing bridges exist, sometimes create technical problems in a scatternet. Mobility and failure of routing devices disconnects the routing links and link reconstruction process consumes more resources that eventually decrease the performance. In this paper, Hybrid Congestion Sharing and Route Repairing protocol for Bluetooth networks” (HCSRR) is proposed. The objective of this paper is to provide an efficient technique for scatternet congestion avoidance and route maintenance. The proposed protocol is implemented and compared with most relevant protocols. From simulation results, it is observed that the HCSRR outperforms the existing protocols.


2020 ◽  
Vol 13 (1) ◽  
pp. 266
Author(s):  
Jiayu Qin ◽  
Gang Mei ◽  
Lei Xiao

Traffic congestion is becoming a critical problem in urban traffic planning. Intelligent transportation systems can help expand the capacity of urban roads to alleviate traffic congestion. As a key concept in intelligent transportation systems, urban traffic networks, especially dynamic traffic networks, can serve as potential solutions for traffic congestion, based on the complex network theory. In this paper, we build a traffic flow network model to investigate traffic congestion problems through taxi GPS trajectories. Moreover, to verify the effectiveness of the traffic flow network, an actual case of identifying the congestion areas is considered. The results indicate that the traffic flow network is reliable. Finally, several key problems related to traffic flow networks are discussed. The proposed traffic flow network can provide a methodological reference for traffic planning, especially to solve traffic congestion problems.


2020 ◽  
Vol 4 (5) ◽  
pp. 884-891
Author(s):  
Salwa Salsabila Mansur ◽  
Sri Widowati ◽  
Mahmud Imrona

Traffic congestion problems generally caused by the increasing use of private vehicles and public transportations. In order to overcome the situation, the optimization of public transportation’s route is required particularly the urban transportation. In this research, the performance analysis of Firefly and Tabu Search algorithm is conducted to optimize eleven public transportation’s routes in Bandung. This optimization aims to increase the dispersion of public transportation’s route by expanding the scope of route that are crossed by public transportation so that it can reach the entire Bandung city and increase the driver’s income by providing the passengers easier access to public transportations in order to get to their destinations. The optimal route is represented by the route with most roads and highest number of incomes. In this research, the comparison results between the reference route and the public transportation’s optimized route increasing the dispersion of public transportation’s route to 60,58% and increasing the driver’s income to 20,03%.


2020 ◽  
Vol 107 ◽  
pp. 102265
Author(s):  
Geraldo P. Rocha Filho ◽  
Rodolfo I. Meneguette ◽  
José R. Torres Neto ◽  
Alan Valejo ◽  
Li Weigang ◽  
...  

2020 ◽  
Vol 3 (2) ◽  
pp. 70
Author(s):  
Farhan Sholahudin ◽  
Agi Rivi Hendardi

Transportation problem is one of the problems that is faced in Tasikmalaya City especially at the intersection. Congestion problems and traffic conflicts often occur at a signal especially in intersection on Siliwangi road Tasikmalaya. One of the efforts made to reduce traffic conflicts and optimize the performance of the junction is by setting up the junction and optimizing the Simpang. The purpose of this research is to know the performance of intersection on Siliwangi road Tasikmalaya and provide recommendations for precise handling, as well as analyzing the traffic conflicts that occurred in the junction. The method used in the performance analysis of the junction signal is to use the calculations in the PKJI 2014, while for analysis of traffic conflicts used to determine the severity of the conflict at the intersection on Siliwangi road Tasikmalaya is using the method Traffic Conflict Technique (TCT). After analysis, the performance in the intersection on Siliwangi road Tasikmalaya Tasikmalaya has approached the critical number of the degree of saturation (DS) of 0.7 with level D. In addition to these problems, there is a traffic conflict crossing as many as 230 events (55%), merging as many as 145 events (35%) and diverging as many as 41 occurrences (10%). With the handling and recommendation of phase setting and cycle time setting, it is proven to suppress and minimize the decline of junction performance level to C level with the value of saturation of 0.58. This will also impact the reduction in the amount of traffic conflicts that occur.Keyword : intersection, traffic conflict, PKJI 2014, phase, cycle time


2020 ◽  
Vol 14 (1) ◽  
pp. 143-153
Author(s):  
Marco Guerrieri ◽  
Matteo Sartori

Background: Roundabouts eliminate some of the most complex and dangerous aspects of traditional at-grade road intersections. In recent times, novel two-level roundabout layouts have been proposed (i.e. target-roundabout and four-flyover roundabout). Nevertheless, no research on underground roundabouts is available. This paper analyzed the underground roundabout planned in the city of Trento (Italy). Objective: The paper examines an underground roundabout in an urban context, planned with the purpose of alleviating traffic congestion in the city of Trento (Italy). Four different layouts have been studied. Methods and Results: This study was conducted with the help of traffic microsimulation in the AIMSUN environment. The traffic model was calibrated using GEH index. The simulated queues are significantly close to the real queues measured in the year 2020. Conclusion: Underground roundabout can reduce queues, travel times, fuel consumption, air pollutant emissions etc. This particular type of roundabout could be used in urban contexts with a traffic demand and congestion problems comparable to those of the present study.


Author(s):  
Keerthan A J ◽  
Likhith H D ◽  
Chetan H S ◽  
Kiran K P ◽  
Dr. Sumaiya MN

The street dividers are commonly utilized for separating the street for continuous and approaching traffic. This is useful in keeping the progression of traffic. For this situation, there is equal number of lanes for both approaching and continuous traffic. Be that as it may, in certain zones, such as in industrial or shopping zones the traffic for the most part streams a one way in the first part of the morning or night. The other roadside is unfilled or unused. It leads to time loss for public and congested driving conditions. We mean to assemble a shrewd street divider as far as a mechanized street divider which moves or move the path coordinating the surge in rush hour gridlock. Such kind of component of traffic framework spares time as well as fuel. It can include 1 more path based the traffic in the specific bearing. With the more intelligent application planned underneath, manual reliance and manual traffic relation is decreased. Like this a proposition of savvy traffic is worked in less, medium and more density in the rush hour gridlock will be appeared in IOT server in utilizing grap diagram. IoT refers to Internet of Things where real digitalization comes into the image. The sensors and Arduino boards are utilized. The sensors are placed on the dividers which sense the progression of traffic and it is refreshed to the web through Wi-Fi module associated. The traffic density will be appeared in IoT server in utilizing graph chart. It gives a superior answer to traffic issue.


Author(s):  
Junita Sri Wisna Hutauruk ◽  
Tekad Matulatan ◽  
Nurul Hayaty

The Activities on the highway that involve vehicles often have congestion problems due to the tightening of the quantity of vehicles on the highway. In addition, there are also problems of order and violations, the use of improper routes, such as vehicles entering the lane that are not intended for the vehicle. Therefore, researchers designed a vehicle detection application in real time based on Android using the YOLO method (You Only Look Once). The analysis carried out using 200 datasets, 4 classes, 10 batches, and 200 epochs. The training process was carried out up to 4000 steps, and the storage of checkpoints to the form of file protob was done at steps 800, 1000, 1200, 1400, 1600, 1800, 2000, 3000, and 4000. Bounding boxes successfully detected and classified objects correctly. This test is done using a Xiaomi Redmi 4X smartphone with a video resolution measuring 768x432 pixels.


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