scholarly journals London 2012: changing delivery patterns in response to the impact of the Games on traffic flows

2014 ◽  
Vol 18 (2) ◽  
pp. 244-261 ◽  
Author(s):  
Michael Browne ◽  
Julian Allen ◽  
Ian Wainwright ◽  
Andrew Palmer ◽  
Ian Williams
Keyword(s):  
Traffic Flows ◽  
London 2012 ◽  
The Impact

scholarly journals The Microsimulation Model for Assessing the Impact of Inbound Traffic Flows for Container Terminals Located near City Centers

2020 ◽  
Vol 12 (22) ◽  
pp. 9478
Author(s):  
Neven Grubisic ◽  
Tomislav Krljan ◽  
Livia Maglić ◽  
Siniša Vilke
Keyword(s):  
Fuel Consumption ◽  
Container Terminal ◽  
Urban Traffic ◽  
Container Terminals ◽  
Critical Parameters ◽  
Traffic Flows ◽  
Traffic Demand ◽  
Gate Time ◽  
The Impact ◽  
The City

The growth of container transport places increasing demand on traffic, especially in situations where container terminals are located near the city centers. The main problem is traffic congestion on networks caused by the integration of Heavy-Duty Vehicles and urban traffic flows. The main objective is to identify the critical traffic parameters which cause negative organizational and environmental impacts on the existing and future traffic demand. A micro-level traffic simulation model was implemented for the testing of the proposed framework-based supply, demand, and control layers. The model was generated and calibrated based on the example of a mid-size Container Terminal “Brajdica” and the City of Rijeka, Croatia. The results indicate that the critical parameters are Queue Length on the approach road to the Container Terminal and the Stop Delay on the main city corridor. High values of these parameters cause negative effects on the environment because of increased fuel consumption and the generation of extra pollution. Due to this problem, a sensitivity analysis of the traffic system performance has been conducted, with a decrement of Terminal Gate Time distribution by 10%. After re-running simulations, the results indicate the impact of subsequent variation in Terminal Gate Time on the decrease of critical parameters, fuel consumption, and vehicle pollution.

scholarly journals Identifying the most influential roads based on traffic correlation networks

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Shengmin Guo ◽  
Dong Zhou ◽  
Jingfang Fan ◽  
Qingfeng Tong ◽  
Tongyu Zhu ◽  
...  
Keyword(s):  
Traffic Congestion ◽  
Temporal Correlation ◽  
Correlation Network ◽  
Traffic Flows ◽  
Weighted Degree ◽  
Correlation Networks ◽  
Spatio Temporal ◽  
Smart Traffic ◽  
The Impact ◽  
Impact Distance

Abstract Prediction of traffic congestion is one of the core issues in the realization of smart traffic. Accurate prediction depends on understanding of interactions and correlations between different city locations. While many methods merely consider the spatio-temporal correlation between two locations, here we propose a new approach of capturing the correlation network in a city based on realtime traffic data. We use the weighted degree and the impact distance as the two major measures to identify the most influential locations. A road segment with larger weighted degree or larger impact distance suggests that its traffic flow can strongly influence neighboring road sections driven by the congestion propagation. Using these indices, we find that the statistical properties of the identified correlation network is stable in different time periods during a day, including morning rush hours, evening rush hours, and the afternoon normal time respectively. Our work provides a new framework for assessing interactions between different local traffic flows. The captured correlation network between different locations might facilitate future studies on predicting and controlling the traffic flows.

Design of a conflict-detection air traffic control tool for the implementation of continuous climb operations: A case study at Palma TMA

2019 ◽  
Vol 233 (13) ◽  
pp. 4839-4852 ◽  
Author(s):  
Javier A Pérez-Castán ◽  
Fernando Gómez Comendador ◽  
Álvaro Rodríguez-Sanz ◽  
Rocío Barragán ◽  
Rosa M Arnaldo-Valdés
Keyword(s):  
Traffic Control ◽  
Air Traffic Control ◽  
Conflict Detection ◽  
Air Traffic ◽  
Traffic Flows ◽  
Control Intervention ◽  
Static Approach ◽  
Operational Concept ◽  
The Impact ◽  
Control Tool

Continuous climb operation is an operational concept that allows airlines to perform an optimal departing trajectory avoiding air traffic control segregation requirements. This concept implies the design and integration of air traffic flows for the sake of safety performance. This paper designs a new conflict-detection air traffic control tool based on the blocking-area concept, characterises the conflict probability between air traffic flows and assesses the impact of continuous climb operation integration in a terminal manoeuvring area. In this paper, a conflict is set out by the infringement of vertical and longitudinal separation minima and coincides with the probability of air traffic control tool usage. Moreover, this research discusses two different approaches for the conflict-detection air traffic control tool: a static approach considering nominal continuous climb operations and landing trajectories, and a dynamic approach that assesses 105 continuous climb operations and landing trajectories. Finally, the air traffic control tool is implemented using Palma TMA data and proves that out of 11 intersections (between departing and landing routes), solely 4 generate vertical separation infringements. The conflict probability between continuous climb operations and arrivals is less than 10−5. Except for one intersection, that is roughly 10−2, similar to current air traffic control intervention designed levels. Therefore, results conclude the viability of the conflict-detection air traffic control tool and continuous climb operations integration.

scholarly journals The impact of traffic flow structure on traffic safety: the case of Slovenian motorways

Transport ◽  
2016 ◽  
Vol 33 (1) ◽  
pp. 216-222 ◽  
Author(s):  
Marina Zanne ◽  
Aleš Groznik
Keyword(s):  
Traffic Safety ◽  
Traffic Accident ◽  
Traffic Accidents ◽  
Road Traffic ◽  
Transport Infrastructure ◽  
Traffic Flows ◽  
Moving Vehicle ◽  
Public Road ◽  
Past Data ◽  
The Impact

Road traffic accident is an accident on a public road in which at least one moving vehicle has been involved and material damage or injury or death has occurred. Traffic accidents occur for various reasons, with one of them being the transport infrastructure and next the condition of traffic environment. Motorways are considered to be the safest roads, which have initially been planned as dedicated roads intended to be travelled only by personal cars, but the evolution of modal split of freight transport in Europe is causing the heterogeneity of traffic flows on these roads, which consequently affects the traffic safety. The aim of this paper is to explore the effects of changing volume and structure of traffic flows on road safety on Slovenian motorways. After the exhaustive analysis of past data, the paper provides different models for forecasting traffic safety on Slovenian motorways.

scholarly journals Paralympic Legacy: Exploring the Impact of the Games on the Perceptions of Young People With Disabilities

2016 ◽  
Vol 33 (4) ◽  
pp. 338-357 ◽  
Author(s):  
Janine Coates ◽  
Philip B. Vickerman
Keyword(s):  
Young People ◽  
Role Models ◽  
Children With Disabilities ◽  
Physical Disabilities ◽  
Self Perceptions ◽  
Perceptions Of Disability ◽  
The United Kingdom ◽  
London 2012 ◽  
The Impact ◽  
Paralympic Games

The London 2012 Olympic and Paralympic Games aimed to deliver a legacy to citizens of the United Kingdom, which included inspiring a generation of young people to participate in sport. This study aimed to understand the legacy of the Paralympic Games for children with disabilities. Eight adolescents (11–16 yr) with physical disabilities were interviewed about their perceptions of the Paralympic Games. Thematic analysis found 3 key themes that further our understanding of the Paralympic legacy. These were Paralympians as role models, changing perceptions of disability, and the motivating nature of the Paralympics. Findings demonstrate that the Games were inspirational for children with disabilities, improving their self-perceptions. This is discussed in relation to previous literature, and core recommendations are made.

MODELING TRAFFIC FLOWS WITH QUEUEING MODELS: A REVIEW

2007 ◽  
Vol 24 (04) ◽  
pp. 435-461 ◽  
Author(s):  
TOM VAN WOENSEL ◽  
NICO VANDAELE
Keyword(s):  
Queueing Networks ◽  
Road Networks ◽  
Queueing Network ◽  
Analytical Application ◽  
Buffer Size ◽  
Queueing Models ◽  
Finite Buffer ◽  
Traffic Flows ◽  
Single Node ◽  
The Impact

In this paper, an overview of different analytic queueing models for traffic on road networks is presented. In the literature, it has been shown that queueing models can be used to adequately model uninterrupted traffic flows. This paper gives a broad review on this literature. Moreover, it is shown that the developed published methodologies (which are mainly single node oriented) can be extended towards queueing networks. First, an extension towards queueing networks with infinite buffer sizes is evaluated. Secondly, the assumption of infinite buffer sizes is dropped leading to queueing networks with finite buffer sizes. The impact of the buffer size when comparing the different queueing network methodologies is studied in detail. The paper ends with an analytical application tool to facilitate the optimal positioning of the counting points on a highway.

scholarly journals Analyzing the Effect of TCP and Server Population on Massively Multiplayer Games

2014 ◽  
Vol 2014 ◽  
pp. 1-17 ◽  
Author(s):  
Mirko Suznjevic ◽  
Jose Saldana ◽  
Maja Matijasevic ◽  
Julián Fernández-Navajas ◽  
José Ruiz-Mas
Keyword(s):  
Network Traffic ◽  
Window Size ◽  
Role Playing ◽  
Traffic Model ◽  
Traffic Flows ◽  
Role Playing Games ◽  
The Impact ◽  
Real Traffic ◽  
Player Behaviour ◽  
Massively Multiplayer

Many Massively Multiplayer Online Role-Playing Games (MMORPGs) use TCP flows for communication between the server and the game clients. The utilization of TCP, which was not initially designed for (soft) real-time services, has many implications for the competing traffic flows. In this paper we present a series of studies which explore the competition between MMORPG and other traffic flows. For that aim, we first extend a source-based traffic model, based on player’s activities during the day, to also incorporate the impact of the number of players sharing a server (server population) on network traffic. Based on real traffic traces, we statistically model the influence of the variation of the server’s player population on the network traffic, depending on the action categories (i.e., types of in-game player behaviour). Using the developed traffic model we prove that while server population only modifies specific action categories, this effect is significant enough to be observed on the overall traffic. We find that TCPVegasis a good option for competing flows in order not to throttle the MMORPG flows and that TCP SACK is more respectful with game flows than other TCP variants, namely,Tahoe, Reno,andNew Reno. Other tests show that MMORPG flows do not significantly reduce their sending window size when competing against UDP flows. Additionally, we study the effect of RTT unfairness between MMORPG flows, showing that it is less important than in the case of network-limited TCP flows.

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