01610328

Component

https://doi.org/10.3141/2570-14

This study demonstrated a comprehensive microsimulation-based emissions modeling framework for a 15.37-km-long road network in the downtown core of Halifax, Canada. The study developed a sequential microscopic traffic simulation and emissions modeling tool to estimate vehicular emissions at a finer-grain spatial resolution using instantaneous speed profiles. The study evaluated the effects of a major infrastructure renewal plan that focuses on rebuilding part of the expressway in the downtown core (e.g., the replacement of multigrade signalized intersections at the Cogswell interchange with roundabouts and associated improvements). Emissions were estimated for six major criteria pollutants, including greenhouse gas (GHG), carbon monoxide (CO), nitrogen oxides (NOx), sulfur dioxide (SO2), particulate matter with a diameter of 10 µm or less (PM-10), and particulate matter with a diameter of 2.5 µm or less (PM-2.5). The results showed significant changes in emission patterns caused by the infrastructure renewal plan. The study evaluated the sensitivity of different traffic attributes as well as their combined effect on emissions’ variation. The results revealed that the plan increased emissions (from 4.246% to 28.571%) in the entire network. However, area-level evaluation suggested a reduction in emissions (from 0.018% to 19.855%) in the roundabout area compared with the multigrade signalized intersections. A land use regression model was also developed to examine the potential effect of land use and built environment attributes on emissions. The microscopic emissions model’s results will assist transportation planners in considering strategies to mitigate air pollution in the final design and implementation of the infrastructure renewal plan.

01590543

16-1140

English

pp 127-138

2016

Transportation Research Record: Journal of the Transportation Research Board

9780309369923

Print

Figures; References; Tables

Air quality; Infrastructure; Land use; Microsimulation; Networks; Pollutants; Urban renewal

Environment; Highways; Planning and Forecasting

TRIS, TRB, ATRI

Sep 7 2016 8:49AM

• Assessment of the Carbon Footprint Reductions of Tricycle Logistics Services
• Comparison of Parallel and Series Hybrid Power Trains for Transit Bus Applications
• Comparison of Vehicle-Specific Fuel Use and Emissions Models Based on Externally and Internally Observable Activity Data
• Deriving Local Operating Distributions to Estimate Transit Bus Emissions Across an Urban Network
• Development of Macroscopic Emission Estimation Model Based on Microscopic Operating Modes
• Emissions Analysis for a Transit Corridor Under Different Improvement Strategies
• Emissions Modeling with MOVES and EMFAC to Assess the Potential for a Transportation Project to Create Particulate Matter Hot Spots
• Estimating Project-Level Vehicle Emissions with Vissim and MOVES-Matrix
• Evaluation of Light-Duty Gasoline Vehicle Rated Fuel Economy Based on In-Use Measurements
• Measuring Pedestrian Exposure to PM-2.5: Case of the Seattle, Washington, International District
• Modeled Effects of Traffic Fleet Composition on the Toxicity of Volatile Organic Compound Emissions
• Modeling Criteria and Air Toxic Pollutants in Light-Duty Biodiesel Exhaust
• Operations and Emissions Characteristics of Light-Duty Vehicles on Ramps
• Optimized Adjustment of Speed Resolution and Time Alignment Data for Improving Emissions Estimations