air quality | National Center for Sustainable Transportation

Measurement and Estimation of Particulate Matter Concentration on Highways in Southern California; Characterization of Diesel Emissions using In-Door Smog Chamber

Principal Investigator Liem Pham
University of California, Riverside

In this study, both stationary and comprehensive mobile monitoring platforms were developed to measure PM concentration and traffic conditions on some major highways in Southern California. The main objective was to develop a set of alternative metrics that measure particle concentrations as well as particle size.

Project Status

Complete

Modeling Framework of Population Exposure to Traffic-related PM2.5 and Environmental Equity Analysis: Case Study in Atlanta, GA.

Principal Investigator Hongyu Lu
Georgia Institute of Technology

In this work, a modeling framework of population exposure to PM2.5 with high spatiotemporal resolution is proposed and applied to the region of Atlanta, GA for environmental equity analysis.

Project Status

Complete

Modeling the Impact of Road Grade on Driving Behavior, Vehicle Energy Consumption, and Emissions

Principal Investigator Haobing Liu, Ph.D.
Georgia Institute of Technology

This study addresses two issues: 1) how road grade impacts vehicle speed and acceleration distributions, and how such distributions vary across vehicle types, roadway types, traffic conditions, etc.; and 2) how significant the impact of integrating grade interactions is with respect to energy, emissions, and air quality modeling.

Project Status

Complete

MOVES-Matrix and Distributed Computing For Region-Level Line Source Dispersion Analysis

Principal Investigator Daejin Kim
Georgia Institute of Technology

This dissertation builds a framework for regional-level micro-scale pollutant dispersion analysis using the MOtor Vehicle Emission Simulator (MOVES)-Matrix and distributed computing across multiple dispersion models.

Project Status

Complete

Physical, chemical and toxicological characteristics of particulate emissions from current technology gasoline direct injection vehicles

Research Product Type

Associated Publication

This article discusses assessment of the the physical, chemical and toxicological characteristics of particulate emissions from four light-duty gasoline direct injection vehicles when operated over the LA92 driving cycle. Results showed that particle mass and number emissions increased markedly during accelerations.

Projecting Reductions in Vehicle Kilometers Traveled from New Bicycle Facilities

Research Product Type

Associated Publication

This paper presents a simple method for projecting the impact of new bicycle facilities on vehicle kilometers traveled.

Quantification Methods for Estimating Greenhouse Gas and Air Pollutant Emission Reductions

Principal Investigator Susan Handy, Ph.D.
University of California, Davis

This research project will gather empirical data, agency reports, and other credible data sources to improve quantification methods used to estimate greenhouse gas emission reductions.

Project Status

Complete

Quantifying Reductions in Vehicle Miles Traveled from New Bike Paths, Lanes, and Cycle Tracks: Summary Report

Research Product Type

Research Report

This report summarizes outcomes from a literature review to determine whether and how the congestion mitigation and air quality improvement (CMAQ) methods could be modified to better reflect emerging data and methods for estimating reductions in vehicle miles traveled (VMT) from new bike facilities.

Quantifying Reductions in Vehicle Miles Traveled from New Bike Paths, Lanes, and Cycle Tracks: Technical Documentation

Research Product Type

Research Report

This report summarizes research outcomes in an effort to update the California Air Resources Board’s (CARB) current methodology for estimating greenhouse gas (GHG) emission reductions from adding new bicycle paths, lanes, and cycle tracks.

Quantifying Reductions in Vehicle Miles Traveled from New Pedestrian Facilities: Summary Report

Research Product Type

Research Report

This report summarizes outcomes from a literature review to determine whether and how the congestion mitigation and air quality improvement (CMAQ) methods could be modified to better reflect emerging data and methods for estimating reductions in vehicle miles traveled (VMT) from new pedestrian facilities, the first step in estimating GHG emission reductions.