scholarly journals Exploring the role of spatial cognition in predicting urban traffic flow through agent-based modelling

2018 ◽  
Vol 109 ◽  
pp. 14-23 ◽  
Author(s):  
Ed Manley ◽  
Tao Cheng
Keyword(s):  
Spatial Cognition ◽  
Traffic Flow ◽  
Urban Traffic ◽  
Agent Based ◽  
Agent Based Modelling ◽  
Flow Through

scholarly journals Urban Wasteful Transport and Its Estimation Methods

2018 ◽  
Vol 10 (12) ◽  
pp. 4562 ◽  
Author(s):  
Xiangyang Cao ◽  
Bingzhong Zhou ◽  
Qiang Tang ◽  
Jiaqi Li ◽  
Donghui Shi
Keyword(s):  
Traffic Flow ◽  
Traffic Congestion ◽  
Transport Theory ◽  
Road Traffic ◽  
Urban Traffic ◽  
Flow Density ◽  
Urban Road ◽  
Road Capacity ◽  
Density Relationship

The paper studies urban road traffic problems from the perspective of resource science. The resource composition of urban road traffic system is analysed, and the road network is proved as a scarce resource in the system resource combination. According to the role of scarce resources, the decisive role of road capacity in urban traffic is inferred. Then the new academic viewpoint of “wasteful transport” was proposed. Through in-depth research, the paper defines the definition of wasteful transport and expounds its connotation. Through the flow-density relationship analysis of urban road traffic survey data, it is found that there is a clear boundary between normal and wasteful transport in urban traffic flow. On the basis of constructing the flow-density relationship model of road traffic, combined with investigation and analysis, the quantitative estimation method of wasteful transport is established. An empirical study on the traffic conditions of the Guoding section of Shanghai shows that there is wasteful transport and confirms the correctness of the wasteful transport theory and method. The research of urban wasteful transport also reveals that: (1) urban road traffic is not always effective; (2) traffic flow exceeding road capacity is wasteful transport, and traffic demand beyond the capacity of road capacity is an unreasonable demand for customers; (3) the explanation that the traffic congestion should apply the comprehensive theory of traffic engineering and resource economics; and (4) the wasteful transport theory and method may be one of the methods that can be applied to alleviate traffic congestion.

scholarly journals Two-pore channels at the intersection of endolysosomal membrane traffic

2015 ◽  
Vol 43 (3) ◽  
pp. 434-441 ◽  
Author(s):  
Jonathan S. Marchant ◽  
Sandip Patel
Keyword(s):  
Nicotinic Acid ◽  
Traffic Flow ◽  
Rab Proteins ◽  
Rab Gtpases ◽  
Ion Permeation ◽  
Voltage Gated ◽  
Proteomic Data ◽  
Flow Through ◽  
Acidic Organelles

Two-pore channels (TPCs) are ancient members of the voltage-gated ion channel superfamily that localize to acidic organelles such as lysosomes. The TPC complex is the proposed target of the Ca2+-mobilizing messenger NAADP, which releases Ca2+ from these acidic Ca2+ stores. Whereas details of TPC activation and native ion permeation remain unclear, a consensus has emerged around their function in regulating endolysosomal trafficking. This role is supported by recent proteomic data showing that TPCs interact with proteins controlling membrane organization and dynamics, including Rab GTPases and components of the fusion apparatus. Regulation of TPCs by PtdIns(3,5)P2 and/or NAADP (nicotinic acid adenine dinucleotide phosphate) together with their functional and physical association with Rab proteins provides a mechanism for coupling phosphoinositide and trafficking protein cues to local ion fluxes. Therefore, TPCs work at the regulatory cross-roads of (patho)physiological cues to co-ordinate and potentially deregulate traffic flow through the endolysosomal network. This review focuses on the native role of TPCs in trafficking and their emerging contributions to endolysosomal trafficking dysfunction.

scholarly journals Cellular Automata Intersection Model

2020 ◽  
Vol 5 ◽  
Author(s):  
Tim Peter Erich Vranken ◽  
Michael Schreckenberg
Keyword(s):  
Cellular Automata ◽  
Traffic Flow ◽  
Variable Number ◽  
Urban Traffic ◽  
Traffic Data ◽  
Traffic Lights ◽  
Car Following ◽  
Time Value ◽  
Intersection Model ◽  
Flow Through

This paper introduces a cellular automaton design of intersections and defines rules to model traffic flow through them, so that urban traffic can be simulated. The model is able to simulate an intersection of up to four streets crossing. Each street can have a variable number of lanes. Furthermore, each lane can serve multiple purposes at the same time, like allowing vehicles to keep going straight or turn left and/or right. The model also allows the simulation of intersections with or without traffic lights and slip lanes. A comparison to multiple empirical intersection traffic data shows that the model is able to realistically reproduce traffic flow through an intersection. In particular, car following times in free flow and the required time value for drivers that turn within the intersection or go straight through it are reproduced. At the same time, important empirical jam characteristics are retained.

scholarly journals The role of responsiveness in deployment policies: A quantitative, cross-country assessment using agent-based modelling

2020 ◽  
Vol 275 ◽  
pp. 115358
Author(s):  
Alejandro Nuñez-Jimenez ◽  
Christof Knoeri ◽  
Fabian Rottmann ◽  
Volker H. Hoffmann
Keyword(s):  
Agent Based ◽  
Agent Based Modelling ◽  
Cross Country
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