scholarly journals Tinjauan Aplikasi Piranti Rel Penyeberang Orang (Piren) Berdasarkan Observasi Dan Persepsi Penyeberang Jalan

2010 ◽  
Vol 22 (7) ◽  
pp. 764-774
Author(s):  
Prima Juanita Romadhona
Keyword(s):  
Traffic Flow ◽  
Waiting Times ◽  
Research Approach ◽  
The Road ◽  
Road Crossing

Densihj of traffic flow in lnrge dties in Indonesin at present has become a big issue; congestion on themain street has become n regulnr tlzing e7.ien1 dmj, especinlly dun·ng the peak hours. Tizis situation ledt.o the pedestrian difficult to cross the road, for example in sclzools in the arterial roads and collectorstreets, pedestrian activihJ sometimes walked chaotic and often 1iehicles do not comply with signs inpedestrian areas so that many acddent cases. Tiiis stud!.; tried t.o review the condition of road userbehavior with the implementation of the Pedestrian Rail Tool (PIREN) which is a tool that thepedestrian crossing is designed to prmnde convenience and safehJ for the pedestrian so it can reducethe number of mctims of acddents while crossing the street. Tire research approach is biJ observationof pedestrian road crossing speeds and long waiting times witlwut and 11rith using PIREN andreaction from pedestrian about PIREN l1J7Plicntlo11 7l'ith the help of questionnaire and then analyzedbij using Importance Perfommnce Analysis metlwd.From 73 PIREN users, appreciating that PIREN can be ne7.U tech tools that make more secure andsafe wlren crossing, but there are still some perfimnance fact.ors that need t.o be improved. Based on thecartesius diagram obtained 2 indicators in quadrant A which are tire main priorihJ for improvedservices, 4 indicators are in tire quadrant B which are perfommnce le7.iels should be maintained, 1indicator is in quadrant C, which is an indimtor of low prion·hJ and 3 indicators in quadrant D thatperformance le7.:iels is excessi11e.Keywords: Pedestrian, PIREN, Importance Perfonnance Analysis

Roadrunner+: An Autonomous Intersection Management Cooperating with Connected Autonomous Vehicles and Pedestrians with Spillback Considered

2022 ◽  
Vol 6 (1) ◽  
pp. 1-29
Author(s):  
Michael I.-C. Wang ◽  
Charles H.-P. Wen ◽  
H. Jonathan Chao
Keyword(s):  
Collision Avoidance ◽  
Autonomous Vehicles ◽  
Waiting Times ◽  
Traffic Signals ◽  
Traffic Load ◽  
The Road ◽  
Road Capacity ◽  
Recent Emergence ◽  
Road Crossing ◽  
Intersection Management

The recent emergence of Connected Autonomous Vehicles (CAVs) enables the Autonomous Intersection Management (AIM) system, replacing traffic signals and human driving operations for improved safety and road efficiency. When CAVs approach an intersection, AIM schedules their intersection usage in a collision-free manner while minimizing their waiting times. In practice, however, there are pedestrian road-crossing requests and spillback problems, a blockage caused by the congestion of the downstream intersection when the traffic load exceeds the road capacity. As a result, collisions occur when CAVs ignore pedestrians or are forced to the congested road. In this article, we present a cooperative AIM system, named Roadrunner+ , which simultaneously considers CAVs, pedestrians, and upstream/downstream intersections for spillback handling, collision avoidance, and efficient CAV controls. The performance of Roadrunner+ is evaluated with the SUMO microscopic simulator. Our experimental results show that Roadrunner+ has 15.16% higher throughput than other AIM systems and 102.53% higher throughput than traditional traffic signals. Roadrunner+ also reduces 75.62% traveling delay compared to other AIM systems. Moreover, the results show that CAVs in Roadrunner+ save up to 7.64% in fuel consumption, and all the collisions caused by spillback are prevented in Roadrunner+.

Research and Improvement of the Keep-Right-Except-to-Pass Rule

2014 ◽  
Vol 915-916 ◽  
pp. 459-463
Author(s):  
He Quan Zhang
Keyword(s):  
Fluid Mechanics ◽  
Traffic Flow ◽  
Influence Factors ◽  
Traffic Model ◽  
Light Traffic ◽  
The Road ◽  
Model Based ◽  
Light Passing ◽  
Improved Model ◽  
The Impact

In order to deal with the impact on traffic flow of the rule, we compare the influence factors of traffic flow (passing, etc.) into viscous resistance of fluid mechanics, and establish a traffic model based on fluid mechanics. First, in heavy and light traffic, we respectively use this model to simulate the actual segment of the road and find that when the traffic is heavy, the rule hinder the further increase in traffic. For this reason, we make further improvements to the model to obtain a fluid traffic model based on no passing and find that the improved model makes traffic flow increase significantly. Then, the improved model is applied to the light traffic, we find there are no significant changes in traffic flow .In this regard we propose a new rule: when the traffic is light, passing is allowed, but when the traffic is heavy, passing is not allowed.

On kinematic waves II. A theory of traffic flow on long crowded roads

1955 ◽  
Vol 229 (1178) ◽  
pp. 317-345 ◽  
Keyword(s):  
Traffic Flow ◽  
Functional Relationship ◽  
Vehicle Speed ◽  
Main Road ◽  
The Road ◽  
Traffic Distribution ◽  
Kinematic Waves ◽  
The Subject ◽  
The Mean ◽  
Starting Flow

This paper uses the method of kinematic waves, developed in part I, but may be read independently. A functional relationship between flow and concentration for traffic on crowded arterial roads has been postulated for some time, and has experimental backing (§2). From this a theory of the propagation of changes in traffic distribution along these roads may be deduced (§§2, 3). The theory is applied (§4) to the problem of estimating how a ‘hump’, or region of increased concentration, will move along a crowded main road. It is suggested that it will move slightly slower than the mean vehicle speed, and that vehicles passing through it will have to reduce speed rather suddenly (at a ‘shock wave’) on entering it, but can increase speed again only very gradually as they leave it. The hump gradually spreads out along the road, and the time scale of this process is estimated. The behaviour of such a hump on entering a bottleneck, which is too narrow to admit the increased flow, is studied (§5), and methods are obtained for estimating the extent and duration of the resulting hold-up. The theory is applicable principally to traffic behaviour over a long stretch of road, but the paper concludes (§6) with a discussion of its relevance to problems of flow near junctions, including a discussion of the starting flow at a controlled junction. In the introductory sections 1 and 2, we have included some elementary material on the quantitative study of traffic flow for the benefit of scientific readers unfamiliar with the subject.

Report on design of modules for the stochastic traffic simulation

2021 ◽  
Author(s):  
Christian Siebke ◽  
◽  
Maximilian Bäumler ◽  
Madlen Ringhand ◽  
Marcus Mai ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Main Part ◽  
Traffic Simulation ◽  
Cognitive Structure ◽  
Flow Simulation ◽  
Road User ◽  
The Road ◽  
Traffic Flow Simulation ◽  
Cognitive Behaviour ◽  
Traffic Simulations

As part of the AutoDrive project, OpenPASS is used to develop a cognitive-stochastic traffic flow simulation for urban intersection scenarios described in deliverable D1.14. The deliverable D4.20 is about the design of the modules for the stochastic traffic simulation. This initially includes an examination of the existing traffic simulations described in chapter 2. Subsequently, the underlying tasks of the driver when crossing an intersection are explained. The main part contains the design of the cognitive structure of the road user (chapter 4.2) and the development of the cognitive behaviour modules (chapter 4.3).

Make More Connections: Urban Traffic Flow Forecasting with Spatiotemporal Adaptive Gated Graph Convolution Network

2022 ◽  
Vol 13 (2) ◽  
pp. 1-25
Author(s):  
Bin Lu ◽  
Xiaoying Gan ◽  
Haiming Jin ◽  
Luoyi Fu ◽  
Xinbing Wang ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Road Network ◽  
Large Scale ◽  
Transportation Systems ◽  
Urban Traffic ◽  
Propagation Mechanism ◽  
Urban Road ◽  
The Road ◽  
Traffic Flow Forecasting ◽  
Gating Mechanism

Urban traffic flow forecasting is a critical issue in intelligent transportation systems. Due to the complexity and uncertainty of urban road conditions, how to capture the dynamic spatiotemporal correlation and make accurate predictions is very challenging. In most of existing works, urban road network is often modeled as a fixed graph based on local proximity. However, such modeling is not sufficient to describe the dynamics of the road network and capture the global contextual information. In this paper, we consider constructing the road network as a dynamic weighted graph through attention mechanism. Furthermore, we propose to seek both spatial neighbors and semantic neighbors to make more connections between road nodes. We propose a novel Spatiotemporal Adaptive Gated Graph Convolution Network ( STAG-GCN ) to predict traffic conditions for several time steps ahead. STAG-GCN mainly consists of two major components: (1) multivariate self-attention Temporal Convolution Network ( TCN ) is utilized to capture local and long-range temporal dependencies across recent, daily-periodic and weekly-periodic observations; (2) mix-hop AG-GCN extracts selective spatial and semantic dependencies within multi-layer stacking through adaptive graph gating mechanism and mix-hop propagation mechanism. The output of different components are weighted fused to generate the final prediction results. Extensive experiments on two real-world large scale urban traffic dataset have verified the effectiveness, and the multi-step forecasting performance of our proposed models outperforms the state-of-the-art baselines.

scholarly journals Assistance of the Youth Organization Community in the Construction of an Integrated Road as an Artificial Recharge for the Slopes of Mount Manglayang through a Participatory Action-Research Approach in Babakan Cikeruh Village

2021 ◽  
Vol 5 (2) ◽  
pp. 329-360
Author(s):  
Riyanto Adji ◽  
Haris Herdiansyah ◽  
Teuku Rezasyah
Keyword(s):  
Artificial Recharge ◽  
Road Construction ◽  
Research Approach ◽  
Youth Organizations ◽  
Participatory Action ◽  
Youth Groups ◽  
The Road ◽  
Action Research Approach ◽  
Agent Of Change ◽  
Participatory Method

Youth is an agent of change for a region, but if youth are affected by the environment and technology, then youth will not be able to make a good contribution to the region, therefore in order for youth to be more productive, it is necessary to be guided, nurtured and directed. As happened to the youth in RW 14 Kampung Babakan CIkeruh, Cimekar Village, Cileunyi Bandung, where most of the youth have been influenced by gadgets and wrong associations. Shifting the role of youth from being productive, there needs to be intensive assistance and empowerment, so that they are able to contribute to their region. In order to be able to assist and empower youth, it is necessary to use a participatory method for youth through youth organizations. The participatory method used is a participatory action study, this method is a research method that uses action/experience steps, reflection, integration, and planning. The use of the participatory study-action method aims to build awareness of youth youth groups in road construction, and through mentoring and empowering youth youth organizations it is hoped that they will be able to realize the wishes of the residents, namely the realization of good and decent roads. proposals for road construction/remediation activities with a length of 50 m and a width of 3 m which are integrated with infiltration wells that function as artificial recharge for dug wells to become a source of clean water for residents around the road. funds for the implementation of its development by exploring the potential around the RW 14 area. By utilizing the existing potential, both the potential of natural resources and the potential of human resources, the road is realized. After the implementation of the work, the youth were directed to compile an accountability report as proof of transparency with the citizens. The results of the mentoring and empowerment of RW 14 youth organizations in general gave a significant change for RW 14 youth youth organizations who initially only played gadgets to become youths who were able to make a real contribution to their area, namely being able to realize the dreams of the community by implementing road construction with concrete rebates.

scholarly journals KAJIAN KINERJA PERSIMPANGAN TIDAK BERSINYAL (STUDI KASUS : PERSIMPANGAN TIGA GADUT, JALAN RAYA INDARUNG – BANDAR BUAT, KOTA PADANG)

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Eko Prayitno ◽  
Veronika Veronika
Keyword(s):  
Traffic Flow ◽  
Environmental Data ◽  
Degree Of Saturation ◽  
Road User ◽  
Total Delay ◽  
The Road ◽  
Traffic Conditions ◽  
Road Capacity ◽  
Side Friction Factor ◽  
Side Friction

The highway is one of the infrastructure for the smooth traffic. One part of the road that are considered necessary to be analyzed and evaluated is an intersection. Three Gadut intersection is non signalized intersection. The traffic flow is quite dense, and lack of discipline of road user factors competing space to pass the crossing, resulting in congestion is very influential on traffic conditions at peak hours in the morning, afternoon and evening. Prior to conducting the survey, the first to do is survey the condition of the intersection that includes geometric characteristics and traffic volume. From the analysis of environmental data, side friction factor to the junction of three Gadut is the criteria being. Rated capacity (C) the smallest is 3706.3 smp/hour, the degree of saturation of 1.1 smp/hour. This value is over the limit permitted values manually indonesian road capacity of 0.8 to 0.9 (1.1> 0.9), it is concluded that the traffic flow is the crossroads of three Gadut saturated traffic flow. The queue probability value between 128.8% - 157.4% with a total delay largest average 11.57 seconds/smp. It is concluded that the chances of a queue at the intersection of three Gadut very large, so it could cause congestion.

scholarly journals PREDICTIVE MODELLING OF TRAFFIC FLOWFLOW IN AKURE, NIGERIA: UNSIGNALIZED INTERSECTIONS IN FOCUS

2017 ◽  
Vol 10 (2) ◽  
pp. 270-278
Author(s):  
Adebayo Oladipo Owolabi ◽  
Olugbenga Joseph Oyedepo ◽  
Enobong Etim Okoko
Keyword(s):  
Traffic Flow ◽  
Predictive Modelling ◽  
Study Data ◽  
Geometric Features ◽  
Peak Period ◽  
Flow Models ◽  
The Road ◽  
Traffic Characteristics ◽  
Unsignalized Intersections ◽  
Before And After

Unsignalized intersections namely two-way stop-controlled intersection (TWSC) and all-way stop-controlled intersection (AWSC) are widely used in Akure. Five intersections consisting of three Tee and two Cross that were critical to traffic flow in the study area were selected for study. Data on geometric features were collected using odometer, while traffic parameters were captured and metered using cine camera placed at a vantage point from the road section during peak and off-peak periods on week days. Traffic flows at the intersections were expressed as functions of traffic characteristics and geometric features of the approaches; while the effect of distances of intersections before and after the intersections studied were also incorporated as a correction factors in the models. The models were developed using multiple linear regression technique with the aid of SPSS software and validated with empirical data other than those used for model calibration. Adjusted R2 values of 0.881 and 0.882 were obtained for Tee and Cross intersections respectively for peak period, while 0.938 and 0.940 respectively were obtained for the off-peak period. These indicate that the flow models are very robust in replicating the observed data. The predictive models have the potential to accurately estimate traffic flow at intersections in the study area and other cities of the world with similar traffic conditions.

scholarly journals THE TRAFFIC VOLUME AND LEVEL OF SERVICE (LOS) OF UNIVERSITI PUTRA MALAYSIA (UPM) SERDANG CAMPUS MAIN ACCESS

2019 ◽  
Vol 17 ◽  
Author(s):  
Zakiah Ponrahono ◽  
Noorain Mohd Isa ◽  
Ahmad Zaharin Aris ◽  
Rosta Harun
Keyword(s):  
Traffic Flow ◽  
Traffic Congestion ◽  
Noise Pollution ◽  
Traffic Volume ◽  
Level Of Service ◽  
Idle Mode ◽  
The Road ◽  
Road Capacity ◽  
Motorized Vehicles ◽  
University Setting

The inbound and outbound traffic flow characteristic of a campus is an important physical component of overall university setting. The traffic circulation generated may create indirect effects on the environment such as, disturbance to lecturetime when traffic congestion occurs during peak-hours, loss of natural environment and greenery, degradation of the visual environment by improper or illegal parking, air pollution from motorized vehicles either moving or in idle mode due to traffic congestion, noise pollution, energy consumption, land use arrangement and health effects on the community of Universiti Putra Malaysia (UPM) Serdang. A traffic volume and Level of Service (LOS) study is required to facilitate better accessibility and improves the road capacity within the campus area. The purpose of this paper is to highlight the traffic volume and Level of Service of the main access the UPM Serdang campus. A traffic survey was conducted over three (3) weekdays during an active semester to understand the traffic flow pattern. The findings on traffic flow during peak hours are highlighted. The conclusions of on-campus traffic flow patterns are also drawn.

scholarly journals SCALE-FREE NETWORK THEORY IN STUDYING THE STRUCTURE OF THE ROAD NETWORK IN POLAND

2014 ◽  
Vol 26 (3) ◽  
pp. 235-242 ◽  
Author(s):  
Katarzyna KOCUR-BERA
Keyword(s):  
Statistical Analysis ◽  
Traffic Flow ◽  
Network Theory ◽  
Road Network ◽  
Scale Free Network ◽  
Scale Free ◽  
The Road ◽  
Normal Character ◽  
Free Network ◽  
The Relationship

This paper discusses the issue of statistical analysis of traffic flow in different regions of Poland. Such analysis allows us to identify “valuable (sensitive) areas” whose damage or blockage may provoke considerable disturbances or even a stoppage of traffic flow in the examined road network. The results of the studies indicate that the road network in Poland has the properties of a scale-free network. The distribution of the examined variables does not have a normal character, whereas the relationship between the number of nodes and the number of connections is a power-law feature. 

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