Survey the impact of different rainfall intensities on urban road traffic operations using Macroscopic Fundamental Diagram

2013 ◽  
Author(s):  
Feifei Xu ◽  
Zhaocheng He ◽  
Zhiren Sha ◽  
Lijian Zhuang ◽  
Wenbo Sun
Keyword(s):  
Road Traffic ◽  
Traffic Operations ◽  
Fundamental Diagram ◽  
Urban Road ◽  
Macroscopic Fundamental Diagram ◽  
The Impact

scholarly journals The impact of courier-, express- and parcel (CEP) service providers on urban road traffic: The case of Vienna

2021 ◽  
Vol 9 ◽  
pp. 100278
Author(s):  
Sebastian Kummer ◽  
Marko Hribernik ◽  
David M. Herold ◽  
Jasmin Mikl ◽  
Mario Dobrovnik ◽  
...  
Keyword(s):  
Service Providers ◽  
Road Traffic ◽  
Urban Road ◽  
The Impact

The impact of iterated games on traffic flow at noncontrolled intersections

2015 ◽  
Vol 26 (01) ◽  
pp. 1550004 ◽  
Author(s):  
Chao Zhao ◽  
Ning Jia
Keyword(s):  
Traffic Flow ◽  
Numerical Experiments ◽  
Learning Ability ◽  
Signal Control ◽  
Field Observations ◽  
Fundamental Diagram ◽  
Cellular Automata Model ◽  
Urban Road ◽  
The Impact ◽  
Flow Experiences

Intersections without signal control widely exist in urban road networks. This paper studied the traffic flow in a noncontrolled intersection within an iterated game framework. We assume drivers have learning ability and can repetitively adjust their strategies (to give way or to rush through) in the intersection according to memories. A cellular automata model is applied to investigate the characteristics of the traffic flow. Numerical experiments indicate two main findings. First, the traffic flow experiences a "volcano-shaped" fundamental diagram with three different phases. Second, most drivers choose to give way in the intersection, but the aggressive drivers cannot be completely eliminated, which is coincident with field observations. Analysis are also given out to explain the observed phenomena. These findings allow deeper insight of the real-world bottleneck traffic flow.

Optimization Monitoring Points of Urban Road Traffic Noise in Binzhou City

2014 ◽  
Vol 1073-1076 ◽  
pp. 522-525
Author(s):  
Fu Guo Zhao
Keyword(s):  
Noise Level ◽  
Road Traffic ◽  
Traffic Noise ◽  
Measurement Data ◽  
Experimental Results ◽  
Road Traffic Noise ◽  
Actual Measurement ◽  
Urban Road ◽  
The Impact

Considering the Impact of the current urban road traffic noise,I optimize the traffic noise monitoring points on the basis of the actual measurement data. The experimental results prove that less monitoring points may reflect the overall traffic noise level in Binzhou City.

scholarly journals MACROSCOPIC MODELING AND CONTROL OF EMISSION IN URBAN ROAD TRAFFIC NETWORKS

Transport ◽  
2015 ◽  
Vol 30 (2) ◽  
pp. 152-161 ◽  
Author(s):  
Alfréd Csikós ◽  
Tamás Tettamanti ◽  
István Varga
Keyword(s):  
Road Traffic ◽  
Traffic Emissions ◽  
Emission Model ◽  
Traffic Networks ◽  
Fundamental Diagram ◽  
Traffic Emission ◽  
Urban Network ◽  
Modeling And Control ◽  
Urban Road ◽  
Road Traffic Networks

This work suggests a framework for modeling the traffic emissions in urban road traffic networks that are described by the Network Fundamental Diagram (NFD) concept. Traffic emission is formalized in finite spatiotemporal windows as a function of aggregated traffic variables, i.e. Total Travel Distances (TTDs) in the network and network average speed. The framework is extended for the size of an urban network during a signal cycle – the size of a window in which the network aggregated parameters are modeled in the NFD concept. Simulations have been carried out for model accuracy analysis, using the microscopic Versit+Micro model as reference. By applying the macroscopic emission model function and the traffic modeling relationships, the control objective for pollution reduction has also been formalized. Basically, multi-criteria control design has been introduced for two criteria: maximization of the TTD and minimization of traffic emissions within the network.

scholarly journals Analytical Model to Estimate Ride Pooling Traffic Impacts by Using the Macroscopic Fundamental Diagram

2022 ◽  
pp. 036119812110648
Author(s):  
Aledia Bilali ◽  
Ulrich Fastenrath ◽  
Klaus Bogenberger
Keyword(s):  
Analytical Model ◽  
Traffic Congestion ◽  
Average Velocity ◽  
Quality Parameters ◽  
Fundamental Diagram ◽  
Private Vehicle ◽  
Macroscopic Fundamental Diagram ◽  
Traffic Impacts ◽  
The Impact ◽  
The City

Ride pooling services are considered as a customer-centric mode of transportation, but, at the same time, an environmentally friendly one, because of the expected positive impacts on traffic congestion. This paper presents an analytical model that can estimate the traffic impacts of ride pooling on a city by using a previously developed shareability model, which captures the percentage of shared trips in an area, and the existence of a macroscopic fundamental diagram for the network of consideration. Moreover, the analytical model presented also investigates the impact that improving the average velocity of a city has on further increasing the percentage of shared trips in an operation area. The model is validated by means of microscopic traffic simulations for a ride pooling service operating in the city of Munich, Germany, where private vehicle trips are substituted with pooled vehicle trips for different penetration rates of the service. The results show that the average velocity in the city can be increased by up to 20% for the scenario when all private vehicle trips are substituted with pooled vehicle trips; however, the improvement is lower for smaller penetration rates of ride pooling. The operators and cities can use this study to quickly estimate the traffic impacts of introducing a ride pooling service in a certain area and for a certain set of service quality parameters.

scholarly journals An Influence Analytical Model of Dedicated Bus Lane on Network Traffic by Macroscopic Fundamental Diagram

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Yingying Ma ◽  
Yuanqi Xie ◽  
Yongjie Lin
Keyword(s):  
Analytical Model ◽  
Road Network ◽  
Network Performance ◽  
Fundamental Diagram ◽  
The Road ◽  
Macroscopic Fundamental Diagram ◽  
Continuous Output ◽  
Bus Lane ◽  
The Impact ◽  
Smooth State

To study the influence mechanism of dedicated bus lanes on the urban road network, this paper proposes a novel analytical model of macroscopic fundamental diagram (MFD) and passenger macroscopic fundamental diagram (p-MFD) and the corresponding indicators based on MFD and p-MFD to evaluate the operation of the network. Taking the grid network as an example, this paper collects traffic flow to calibrate the developed MFD and p-MFD and evaluates the network performance under different proportions of dedicated bus lanes. The simulation results show that the larger the proportion of dedicated bus lanes, the greater the impact on the rising section and the stable section of MFD and the descending section and post-stable section of p-MFD. Further analysis for the sensitivity of simulation experiments found that the strategy of setting dedicated bus lanes will improve the efficiency of vehicle and passenger transport when the road network is in a smooth state and ensure the continuous output of passengers when the network is in a congested state.

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