Variability of Vehicle Emissions and Congestion Forecasting

2008 ◽  
Author(s):  
Michael Claggett ◽  
H. Sarah Sun
Keyword(s):  
Vehicle Emissions

Relationship between On-Road Vehicle Emissions and Gear Switching

ICTE 2011 ◽  
2011 ◽  
Author(s):  
Kairan Zhang ◽  
Haibo Chen ◽  
Guofang Li ◽  
Zhihui Tang
Keyword(s):  
Vehicle Emissions ◽  
Road Vehicle

scholarly journals Quantifying Air Pollutant Variations during COVID-19 Lockdown in a Capital City in Northwest China

Atmosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 788
Author(s):  
Rong Feng ◽  
Hongmei Xu ◽  
Zexuan Wang ◽  
Yunxuan Gu ◽  
Zhe Liu ◽  
...  
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Rural Areas ◽  
Vehicle Emissions ◽  
Motor Vehicle ◽  
Northwest China ◽  
Air Pollutant ◽  
Capital City ◽  
Air Pollution Control ◽  
Motor Vehicle Emissions

In the context of the outbreak of coronavirus disease 2019 (COVID-19), strict lockdown policies were implemented to control nonessential human activities in Xi’an, northwest China, which greatly limited the spread of the pandemic and affected air quality. Compared with pre-lockdown, the air quality index and concentrations of PM2.5, PM10, SO2, and CO during the lockdown reduced, but the reductions were not very significant. NO2 levels exhibited the largest decrease (52%) during lockdown, owing to the remarkable decreased motor vehicle emissions. The highest K+ and lowest Ca2+ concentrations in PM2.5 samples could be attributed to the increase in household biomass fuel consumption in suburbs and rural areas around Xi’an and the decrease in human physical activities in Xi’an (e.g., human travel, vehicle emissions, construction activities), respectively, during the lockdown period. Secondary chemical reactions in the atmosphere increased in the lockdown period, as evidenced by the increased O3 level (increased by 160%) and OC/EC ratios in PM2.5 (increased by 26%), compared with pre-lockdown levels. The results, based on a natural experiment in this study, can be used as a reference for studying the formation and source of air pollution in Xi’an and provide evidence for establishing future long-term air pollution control policies.

Estimating Project-Level Vehicle Emissions with Vissim and MOVES-Matrix

2016 ◽  
Vol 2570 (1) ◽  
pp. 107-117 ◽  
Author(s):  
Xiaodan Xu ◽  
Haobing Liu ◽  
James M. Anderson ◽  
Yanzhi (Ann) Xu ◽  
Michael P. Hunter ◽  
...  
Keyword(s):  
Vehicle Emissions ◽  
Project Level

Environmental and public health effects of vehicle emissions in a large metropolis: Case study of a truck driver strike in Sao Paulo, Brazil

2020 ◽  
Vol 11 (6) ◽  
pp. 24-31 ◽  
Author(s):  
Luciana Ferreira Leite Leirião ◽  
Daniela Debone ◽  
Theotonio Pauliquevis ◽  
Nilton Manuel Évora do Rosário ◽  
Simone Georges El Khouri Miraglia
Keyword(s):  
Public Health ◽  
Health Effects ◽  
Vehicle Emissions ◽  
Sao Paulo ◽  
Truck Driver ◽  
São Paulo
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