scholarly journals Analyzing railroad congestion in a dense urban network through the use of a road traffic network fundamental diagram concept

2015 ◽  
Vol 7 (3) ◽  
pp. 355-367 ◽  
Author(s):  
Pierre-Antoine Cuniasse ◽  
Christine Buisson ◽  
Joaquin Rodriguez ◽  
Emmanuel Teboul ◽  
David de Almeida
Keyword(s):  
Road Traffic ◽  
Traffic Network ◽  
Fundamental Diagram ◽  
Urban Network ◽  
Network Fundamental Diagram

Nonlinear gating control for urban road traffic network using the network fundamental diagram

2014 ◽  
Vol 49 (5) ◽  
pp. 597-615 ◽  
Author(s):  
Alfréd Csikós ◽  
Tamás Tettamanti ◽  
István Varga
Keyword(s):  
Road Traffic ◽  
Traffic Network ◽  
Fundamental Diagram ◽  
Urban Road ◽  
Network Fundamental Diagram

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 A New Cellular Automaton Model for Urban Two-Way Road Networks

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Junqing Shi ◽  
Lin Cheng ◽  
Jiancheng Long ◽  
Yuanlin Liu
Keyword(s):  
Cellular Automaton ◽  
Road Traffic ◽  
Vehicle Speed ◽  
Flow State ◽  
Fundamental Diagram ◽  
Network Systems ◽  
Traffic Dynamics ◽  
Ca Model ◽  
Additional Rule ◽  
Network Fundamental Diagram

A new cellular automaton (CA) model is proposed to simulate traffic dynamics in urban two-way road network systems. The NaSch rule is adopted to represent vehicle movements on road sections. Two novel rules are proposed to move the vehicles in intersection areas, and an additional rule is developed to avoid the “gridlock” phenomenon. Simulation results show that the network fundamental diagram is very similar to that of road traffic flow. We found that the randomization probability and the maximum vehicle speed have significant impact on network traffic mobility for free-flow state. Their effect may be weak when the network is congested.

scholarly journals Traffic Inequality and Relations in Maritime Silk Road: A Network Flow Analysis

2021 ◽  
Vol 10 (1) ◽  
pp. 40
Author(s):  
Naixia Mou ◽  
Haonan Ren ◽  
Yunhao Zheng ◽  
Jinhai Chen ◽  
Jiqiang Niu ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Network Flow ◽  
Road Traffic ◽  
Flow Analysis ◽  
Silk Road ◽  
Identification System ◽  
Traffic Network ◽  
Trajectory Data ◽  
Maritime Traffic ◽  
Maritime Silk Road

Maritime traffic can reflect the diverse and complex relations between countries and regions, such as economic trade and geopolitics. Based on the AIS (Automatic Identification System) trajectory data of ships, this study constructs the Maritime Silk Road traffic network. In this study, we used a complex network theory along with social network analysis and network flow analysis to analyze the spatial distribution characteristics of maritime traffic flow of the Maritime Silk Road; further, we empirically demonstrate the traffic inequality in the route. On this basis, we explore the role of the country in the maritime traffic system and the resulting traffic relations. There are three main results of this study. (1) The inequality in the maritime traffic of the Maritime Silk Road has led to obvious regional differences. Europe, west Asia, northeast Asia, and southeast Asia are the dominant regions of the Maritime Silk Road. (2) Different countries play different maritime traffic roles. Italy, Singapore, and China are the core countries in the maritime traffic network of the Maritime Silk Road; Greece, Turkey, Cyprus, Lebanon, and Israel have built a structure of maritime traffic flow in the eastern Mediterranean Sea, and Saudi Arabia serves as a bridge for maritime trade between Asia and Europe. (3) The maritime traffic relations show the characteristics of regionalization; countries in west Asia and the European Mediterranean region are clearly polarized, and competition–synergy relations have become the main form of maritime traffic relations among the countries in the dominant regions. Our results can provide a scientific reference for the coordinated development of regional shipping, improvement of maritime competition, cooperation strategies for countries, and adjustments in the organizational structure of ports along the Maritime Silk Road.

Sign in / Sign up

Export Citation Format

Share Document