Using Archived Data to Measure Operational Benefits of a System-Wide Adaptive Ramp Metering (SWARM) System: Appendix Online 4: I-205 NB Flow-Occupancy Plots

Portland State University. Department of Civil & Environmental Engineering

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Using Archived Data to Measure Operational Benefits of a System-Wide Adaptive Ramp Metering (SWARM) System: Appendix Online 4: I-205 NB Flow-Occupancy Plots

2008-12-01
By Portland State University. Department of Civil & Environmental Engineering

[PDF-424.86 KB]

English

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Corporate Creators:

Portland State University. Department of Civil & Environmental Engineering
Corporate Contributors:

Oregon Transportation Research and Education Consortium
Subject/TRT Terms:

[+]

Data Plotters Graphs Highways I73: Traffic Contro Lane Occupancy Operations And Traffic Management Traffic Speed
Resource Type:

Statistical Report
Geographical Coverage:

Oregon ; United States

Oregon ; United States Less -
Corporate Publisher:

Oregon Transportation Research and Education Consortium
Abstract:

A System-Wide Adaptive Ramp Metering (SWARM) system has been implemented in the Portland, Oregon metropolitan area, replacing the previous pre-timed ramp-metering system that had been in operation since 1981. SWARM has been deployed on six major corridors and operates during the morning and afternoon peak hours. This report presents results of a “before” and “after” evaluation of the performance of two freeway corridors as part of ongoing efforts to measure the benefits of the new SWARM system, as compared to the pre-timed system. The study benefited from using the existing regional data, surveillance and communications infrastructure in addition to a regional data archive system. The evaluation revealed that the operation of the SWARM system, as currently configured in the Portland metropolitan region, produced mixed results when comparing the selected performance metrics to pre-timed operation.
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PDF
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

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urn:sha256:048ccb5fc77b1a8e3c7347f67cb48884737736498db3235da8c2753d49c9ba91
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https://rosap.ntl.bts.gov/view/dot/21803/dot_21803_DS1.pdf
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Using Archived Data to Measure Operational Benefits of a System-Wide Adaptive Ramp Metering (SWARM) System: Appendix Online 4: I-205 NB Flow-Occupancy Plots

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