A considerable amount of pollution to the air in the forms of criteria pollutants and greenhouse gases comes from the on-road mobile sources. In the USA, since the Clean Air Act of 1970, there is a significant improvement in curbing transportation-related air pollutant emissions on roads through better technology, alternative fuels, planning, and implementation strategies. However, there are also more vehicles on roads than they were in the 1970s. Hence, it is important to assess the changes in the contribution of various parts of the highways to air pollutant emissions in a period of time. This study focuses on studying the changes in the emissions of four criteria pollutants (CO, NOx, SO2, and PM) and three greenhouse gases (CH4, N2O, and CO2) on three types of highways in six Ohio urban counties in the period of 2008-2018. For the study purposes, on-road vehicles are considered as gasoline-run passenger cars and diesel-run trucks. Traffic data is obtained from Ohio Department of Transportation in the form of Annual Average Daily Traffic (AADT). Individual air pollutant emission is estimated with the EPA’s MOtor Vehicle Emission Simulator (MOVES). The classification of the roads based on the emissions is done using Self Organizing Maps in the beginning years and the ending years of the study period, and comparison analysis is performed based on the SOM maps.

Decadal changes in highway emissions: Comparison of six urban Ohio counties

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.