United States Department of Transportation
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AERIS - applications for the environment : real-time information synthesis : low emissions zone (LEZ) operational scenario modeling report.
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2015-01-01
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[PDF-3.03 MB]
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Abstract:This report describes the analysis and modeling effort that was conducted to simulate the potential
impacts of a Low Emissions Zone (LEZ) strategy. LEZs are designated areas within a metropolitan
region where special measures are implemented with a view to modifying traveler behavior and
choices so that the energy and emissions footprint of travel associated with the designated area
becomes smaller. Within the LEZ modeling effort undertaken in this project, the effects of incentive-based policies where travelers receive a monetary or other benefit for using clean vehicles (low
emission vehicles) in the context of travel to the designated LEZ are simulated. The modeling effort
involved the use of a novel continuous-time integrated model system that included both an activity-based microsimulation model system of travel demand and a computationally efficient dynamic
traffic assignment (DTA) model. The report describes the scenarios considered, the case study
area, and the modeling and simulation methodology employed in the project. The report presents
detailed results of the simulation study for the specific scenarios considered, and identifies
opportunities and directions for further research and analysis. Within the context of the specific
scenarios considered in this report, the simulation results suggest that energy and emissions
benefits of 3 percent to 5 percent may be achieved with even very modest penetration of ecovehicles in the market. Coupled with enhanced transit (ET) services, benefits in the range of 15
percent to 20 percent may be achieved, indicating the presence of a strong synergistic effect when
ET services are coupled with LEZ strategies.
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