Simulation of smoke from a burning vehicle and pollution levels caused by traffic jam in a road tunnel

2005 ◽  
Vol 20 (3) ◽  
pp. 281-290 ◽  
Author(s):  
S. Bari ◽  
J. Naser
Keyword(s):  
Road Tunnel ◽  
Traffic Jam ◽  
Pollution Levels

Computation of Ventilation Aerodynamics in Singapore’s Kallang Paya Lebar Expressway Underground Tunnel

2003 ◽  
Author(s):  
S. Dayanandan ◽  
M. Damodaran
Keyword(s):  
Fluid Dynamics ◽  
Scenario Planning ◽  
Flow Modeling ◽  
Road Tunnel ◽  
Traffic Jam ◽  
Pollution Levels ◽  
Fire Scenarios ◽  
And Control ◽  
Effective Design ◽  
Ventilation Studies

This work is concerned with the development and application of a computational fluid dynamics based model for predicting all possible ventilation aerodynamic flow, pollution and fire scenarios in an underground road tunnel that is being constructed in Singapore. This work addresses flow modeling for the underground road tunnel ventilation studies, pollution and fire modeling studies and presents the computed results and discussion pertaining to the estimation of pollution levels in the underground road tunnel during a simulated traffic jam and the simulation of vehicular fires in the tunnel and the management and control of a simulated fire in the tunnel by operating flow conditioning and ventilation systems. The model can serve as a tool for enabling the engineers to perform scenario planning for effective design and control of the ventilation inside the tunnel.

Novel correlation to evaluate the pressure losses for different traffic jam conditions in road tunnel with alternative jet fan, second part

2020 ◽  
Vol 96 ◽  
pp. 103213 ◽  
Author(s):  
Marilena Musto ◽  
Furio Cascetta ◽  
Carmine D'Alessandro ◽  
Davide De Maio ◽  
Giuseppe Rotondo
Keyword(s):  
Road Tunnel ◽  
Pressure Losses ◽  
Traffic Jam ◽  
Jet Fan

scholarly journals Analysis of air pollution caused by mass transportation design changes

2018 ◽  
Vol 195 ◽  
pp. 04021
Author(s):  
Budiman Napitupulu ◽  
Ismiyati Ismiyati ◽  
Mudjiastuti Handajani
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Public Transportation ◽  
Simulation Method ◽  
Degree Of Saturation ◽  
Traffic Jam ◽  
Pollution Levels ◽  
Urban Quality Of Life ◽  
Mass Public ◽  
Design Changes

Traffic jams are a common phenomenon in Indonesia’s big cities due to the proliferation of private vehicles. The resulting air pollution directly threatens public health and urban quality of life. This research is to identify and analyze air pollution levels and forecast the potential to improve air quality by developing mass public transportation. This research employs the dust sampler method to measure the air pollution levels and calculate traffic volume, while the simulation method is used to analyze the data. The results show that the air pollution levels detected exceed the air quality thresholds established by regulations in the Decision by the Minister of Health and Environment. Traffic jam levels indicated by the Degree of Saturation (SD) were determined to be, on average, > 0.75. The simulation results show that by changing modes of transportation traffic jam levels decrease, ranging from 0.2201 to 0.291(DS), and air pollution decreases. Specifically, nitrogen oxides (NOx) are reduced by 48.19 %; sulfur dioxide (SO2) is reduced by 51.77 %; particulate matter (PM) is reduced by 29.86%; lead (Pb) is reduced by 52.22%; and carbon monoxide (CO) is reduced by 52.15%. This research suggests the mass public transportation planning should be implemented.

scholarly journals Behaviors and Causal Explanations of Road-Tunnel Users During a Fire

2020 ◽  
Vol 9 (1) ◽  
pp. 69-84
Author(s):  
Dongo Rémi Kouabenan ◽  
Mihaela Calatan ◽  
Marc Gandit ◽  
Sandrine Caroly
Keyword(s):  
Perceived Stress ◽  
Risky Behaviors ◽  
Road Tunnel ◽  
Internal Factors ◽  
Causal Explanations ◽  
Traffic Jam ◽  
Congested Traffic ◽  
Tunnel Fire ◽  
Preventive Actions ◽  
Unsafe Behaviors

The present study was aimed at describing the behaviors of tunnel users in the event of a road-tunnel fire,and to determine the effect of stress on these behaviors. Another aim was to identify the causal explanationsoffered by tunnel users for fires and for non-evacuation behaviors after a fire alarm is given. Several fire scenarioswere presented to 217 participants, who were asked to predict their likely behavior in the situations described,and to give explanations for the fire's occurrence. The participants' perceived stress level was also measured usinga subscale taken from the Depression Anxiety Stress Scales (DASS; Lovibond, & Lovibond, 1995). The resultsshowed that the participants tended to adopt more risky behaviors in situations where traffic was moving freelythan in congested traffic. The users' perceived stress led them to adopt unsafe behaviors, but contrary to Hennessyand Wiesenthal's (1997) results, this relationship was stronger in free-flowing traffic than in a traffic jam. Someof the participants demonstrated a certain behavioral rigidity, tending to adopt identical behaviors regardless ofthe traffic situation. The behaviors stated for a given situation seem to be consistent, but they were not alwayssafety-conscious. And the more serious the fire, the more internal the explanations were. Finally, non-evacuationbehaviors were attributed mainly to internal factors that implicated the concerned individuals. Some suggestionsfor long-term preventive actions based on users' beliefs and representations are proposed

Novel correlation to evaluate the pressure losses for different traffic jam conditions in road tunnel

2019 ◽  
Vol 86 ◽  
pp. 165-173 ◽  
Author(s):  
Furio Cascetta ◽  
Marilena Musto ◽  
Giuseppe Rotondo ◽  
Carmine D'Alessandro ◽  
Davide De Maio
Keyword(s):  
Road Tunnel ◽  
Pressure Losses ◽  
Traffic Jam

Stochastic Model of Traffic Jam and Traffic Signal Control

2011 ◽  
Vol 131 (2) ◽  
pp. 303-310
Author(s):  
Ji-Sun Shin ◽  
Cheng-You Cui ◽  
Tae-Hong Lee ◽  
Hee-hyol Lee
Keyword(s):  
Stochastic Model ◽  
Traffic Signal ◽  
Signal Control ◽  
Traffic Signal Control ◽  
Traffic Jam

Analisis Kandungan Mikroba, Formalin, dan Timbal (Pb) pada Tahu Sumedang yang Dijual Di Daerah Macet Cicurug, Ciawi, dan Cisarua Jawa Barat

2020 ◽  
Vol 6 (1) ◽  
pp. 087
Author(s):  
Rosy Hutami ◽  
M Fakih Kurniawan ◽  
Henna Khoerunnisa
Keyword(s):  
Content Analysis ◽  
Microbial Contamination ◽  
Atomic Absorption Spectrophotometry ◽  
Plate Count ◽  
Traffic Jam ◽  
Absorption Spectrophotometry ◽  
Traffic Jams ◽  
Total Plate Count ◽  
Microbial Analysis ◽  
Aas Method

Sumedang tofu is one of favorite foods for Indonesian society. But many sellers or producers are not aware to the food safety of sumedang tofu. The aims of this study were to analyze the microbial, formalin, and lead (Pb) contents in ready-to-eat sumedang tofu which were sold in traffic jams area in Cicurug, Ciawi, and Cisarua. The analysis were carried out by Total Plate Count (TPC) testing for microbial analysis, potassium permanganate reaction (KMnO4) testing for formaldehyde analysis, and atomic absorption spectrophotometry (AAS) method for lead content analysis in the samples. The results obtained for the microbial analysis were sumedang tofu that were sold in the traffic jam areas of Cicurug, Ciawi, and Cisarua contained contaminant above the treshold (1.4 x 105 colonies / gram to 2.2 x 105 colonies / gram of microbes). All of the samples of sumedang tofu were positive containing formaldehyde. Otherwise, there were no lead (Pb) content in all samples regarding to AAS analysis. This study concluded that the ready-to-eat sumedang tofu those were sold in traffic jam area in the Cicurug, Ciawi, and Cisarua were not suitable for consumption because it contained exceed microbial contamination and formalin which are harmful for human health.Keywords : formalin, microbes, sumedang tofu, lead, traffic jam

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