From traffic flow simulations to pollutant concentrations in street canyons and backyards

2008 ◽  
Vol 23 (3) ◽  
pp. 288-295 ◽  
Author(s):  
Clemens Mensink ◽  
Guido Cosemans
Keyword(s):  
Traffic Flow ◽  
Street Canyons ◽  
Flow Simulations ◽  
Pollutant Concentrations

Spatial distribution of traffic-related pollutant concentrations in street canyons

2003 ◽  
Vol 37 (23) ◽  
pp. 3213-3224 ◽  
Author(s):  
Shaodong Xie ◽  
Yuanhang Zhang ◽  
Li Qi ◽  
Xiaoyan Tang
Keyword(s):  
Spatial Distribution ◽  
Street Canyons ◽  
Pollutant Concentrations

Traffic Flow on Gradient Highway and its Stability

2011 ◽  
Vol 97-98 ◽  
pp. 877-882 ◽  
Author(s):  
Wen Xing Zhu ◽  
Rui Ling Yu ◽  
Zhi Ping Jia
Keyword(s):  
Traffic Flow ◽  
Flow Model ◽  
Linear Stability Theory ◽  
Stability Conditions ◽  
Traffic Flow Model ◽  
Flow Simulations ◽  
Numerical Result ◽  
The Stability ◽  
Real Traffic ◽  
Good Agreement

In this paper we investigated the stability of the traffic flow on a single lane gradient (uphill/downhill) highway. The linear stability theory was used to analyze the model and get the stability conditions. The theoretical result shows that the slope of the gradient has an influence on the stability of traffic flow. Simulations are carried out to check the slope effect of the traffic flow model. Numerical result is in good agreement with the real traffic situations.

scholarly journals Large eddy simulation of the aerodynamic effects of trees on pollutant concentrations in street canyons

2011 ◽  
Vol 4 ◽  
pp. 17-24 ◽  
Author(s):  
S.M. Salim ◽  
R. Buccolieri ◽  
A. Chan ◽  
S. Di Sabatino ◽  
S.C. Cheah
Keyword(s):  
Large Eddy Simulation ◽  
Street Canyons ◽  
Eddy Simulation ◽  
Pollutant Concentrations ◽  
Large Eddy

scholarly journals Air Corridors: Concept, Design, Simulation, and Rules of Engagement

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7536
Author(s):  
Sabrina Islam Muna ◽  
Srijita Mukherjee ◽  
Kamesh Namuduri ◽  
Marc Compere ◽  
Mustafa Ilhan Akbas ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Ground Level ◽  
Operational Efficiency ◽  
Collision Probability ◽  
Concept Design ◽  
First Responder ◽  
Air Ambulances ◽  
Metropolitan Regions ◽  
Above Ground Level ◽  
Flow Simulations

Air corridors are an integral part of the advanced air mobility infrastructure. They are the virtual highways in the sky for the transportation of people and cargo in a controlled airspace at an altitude of around 1000 ft. to 2000 ft. above ground level. These corridors will be utilized by (unmanned) air taxis, which will be deployed in rural and metropolitan regions to carry passengers and freight, as well as air ambulances, which will be deployed to offer first responder services such as 911 emergencies. This paper presents fundamental insights into the design of air corridors with high operational efficiency as well as zero collisions. It begins with the definitions of air cube, skylane or track, intersection, vertiport, gate, and air corridor. Then a multi-layered air corridor model is proposed. Traffic at intersections is analyzed in detail with examples of vehicles turning in different directions. The concept of capacity of an air corridor is introduced along with the nature of distribution of locations of vehicles in the air corridor and collision probability inside the corridor are discussed. Finally, results of traffic flow simulations are presented.

scholarly journals Estimating the contribution of traffic flow to pollutant concentrations

2021 ◽  
Vol 836 (1) ◽  
pp. 012002
Author(s):  
Ahmed Khataan ◽  
Ahmed O Idris ◽  
Mohamed M Abo Elazm ◽  
Wael Kamel
Keyword(s):  
Traffic Flow ◽  
Pollutant Concentrations

scholarly journals Assessment of air pollution in cities by road transport in projects for managing the metropolis ecological state

2021 ◽  
pp. 125-134
Author(s):  
Olena Bakulich ◽  
Evgen Samoilenko
Keyword(s):  
Air Pollution ◽  
Traffic Flow ◽  
Pollution Assessment ◽  
Road Transport ◽  
Pollution Level ◽  
Ecological State ◽  
Street Canyons ◽  
City Street ◽  
Operational Forecasting ◽  
The City

The article is devoted to the study of the pollution level in the city streets by road transport. Purpose. The aim of the work is to operative assess the concentration of pollutants in street canyons in projects for managing the ecological state of the metropolis. Research Methodology. The article used statistical analysis, mathematical modeling. Scientific novelty. A model for assessing the level of air pollution in city street canyons is proposed. On the basis of this model, the concentration of pollutants in the street canyons of the Pechersky district of Kiev was determined, taking into account the daily dynamics of the traffic flows intensity. Conclusions. The research results can be used in the operational forecasting of the pollution level of the roadside space ecosystems, which will allow timely, by controlling the parameters of the traffic flow, to prevent critical situations in which the concentration of pollutants exceeds the maximum permissible values. Key words: management, transport, pollution assessment, traffic flow, design, modeling of pollution fields.

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