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Increasing freeway merge capacity th...
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Rudjanakanoknad, Jittichai.
Increasing freeway merge capacity through on-ramp metering.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Increasing freeway merge capacity through on-ramp metering.
作者:
Rudjanakanoknad, Jittichai.
面頁冊數:
66 p.
附註:
Chair: Michael J. Cassidy.
附註:
Source: Dissertation Abstracts International, Volume: 66-08, Section: B, page: 4378.
Contained By:
Dissertation Abstracts International66-08B.
標題:
Engineering, Civil.
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3187138
ISBN:
9780542291456
Increasing freeway merge capacity through on-ramp metering.
Rudjanakanoknad, Jittichai.
Increasing freeway merge capacity through on-ramp metering.
- 66 p.
Chair: Michael J. Cassidy.
Thesis (Ph.D.)--University of California, Berkeley, 2005.
The experiments conducted in the present study verify that on-ramp metering can increase freeway merge capacities. Detailed traffic data collected from videos for more than 30 rush periods at two merge bottlenecks unveil six major research findings: (1) merge capacity diminishes after merges became active bottlenecks; (2) the mechanism of "capacity drop" has been identified and was found to be reproducible across all days and at both sites. By metering the on-ramp in certain strategic ways, the capacity drop mechanism can be (3) reversed; and (4) even averted; (5) such metering strategies can be fully automated using loop detector measurements; and (6) control strategies other than ramp metering also hold promise for increasing merge capacities.
ISBN: 9780542291456Subjects--Topical Terms:
212394
Engineering, Civil.
Increasing freeway merge capacity through on-ramp metering.
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The experiments conducted in the present study verify that on-ramp metering can increase freeway merge capacities. Detailed traffic data collected from videos for more than 30 rush periods at two merge bottlenecks unveil six major research findings: (1) merge capacity diminishes after merges became active bottlenecks; (2) the mechanism of "capacity drop" has been identified and was found to be reproducible across all days and at both sites. By metering the on-ramp in certain strategic ways, the capacity drop mechanism can be (3) reversed; and (4) even averted; (5) such metering strategies can be fully automated using loop detector measurements; and (6) control strategies other than ramp metering also hold promise for increasing merge capacities.
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These findings provide much-needed information concerning how to control freeway traffic. They also offer basis for more realistic theories of merging traffic flow.
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This research describes field studies of how on-ramp metering can increase the capacity of freeway merges. Some effects of on-ramp metering have been known for a long time. We have known that on-ramp metering can (1) increase freeway flow and speed upstream of a merge; and (2) reduce system-wide delay by alleviating gridlock-causing queues that have blocked off-ramps. However, past studies have not conclusively shown that on-ramp metering can increase the maximum outflow (capacity) of freeway merges.
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