United States Department of Transportation
i
Seattle/Lake Washington corridor urban partnership agreement : national evaluation report.
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2014-12-01
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[PDF-10.29 MB]
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Abstract:This document presents the final report on the national evaluation of the Seattle/Lake Washington Corridor (LWC) Urban
Partnership Agreement (UPA) under the United States Department of Transportation (U.S. DOT) UPA Program. The Seattle UPA
projects focus on reducing congestion by employing strategies consisting of combinations of Tolling, Transit, Telecommuting/TDM,
and Technology, also known as the 4Ts. Those strategies including tolling all lanes of the SR 520 bridge, additional bus service in
the SR 520 corridor, implementing active traffic management systems, and real-time traveler information signs on highways and
at transit stops and stations. The national evaluation of the Seattle/LWC UPA projects is guided by the National Evaluation
Framework, the Seattle/LWC UPA National Evaluation Plan, and individual test plans for various components. This report provides
information on the use of the new Seattle/LWC UPA projects. Changes in travel speeds, travel times, trip-time reliability, park-and-ride lot use, and transit ridership are described. The results of interviews and workshops with local stakeholders, surveys of
different user groups, and interviews and focus groups with Washington State Patrol officers, bus operators, and service patrol
personnel are presented. The air quality, energy, and safety impacts of the Seattle/LWC UPA projects are examined. Information
on changes in unemployment rates, gasoline prices, and parking costs is also summarized.
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