Title: IMPACTS OF TSM IMPROVEMENTS ON EASTBOUND SR 520
Abstract: In 1986, the Washington State Department of Transportation sponsored a project that analyzed and evaluated the impacts of ramp metering and a new ramp HOV lane on eastbound highway SR 520, which connects Seattle to the suburbs east of Lake Washington. The data analyzed included postcard origin-destination surveys, postcard surveys of perceived travel times and vehicle occupancies, manual vehicle occupancy counts, floating car travel times, queue length counts, electronic volume and land occupancy counts, and bus travel times. The results indicated that the number of carpools and vanpools increased significantly on the ramp with the new HOV lane and that the overall level of service was improved for main-line SR 520. A significant number of trips were diverted from the local neighborhood to I-5. This result was expected and had the desired effect of diverting trips from the neighborhood and increasing HOV ridership.
Publication Year: 1988
Publication Date: 1988-01-01
Language: en
Type: article
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Cited By Count: 1
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