Peirce, Sean; Margaret Petrella; Sean Puckett; Paul Minnice; Jane Lappin
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The Seattle/Lake Washington Corridor (S/LWC) Urban Partnership Agreement (UPA), a project under the USDOT UPA Program, was focused on reducing congestion on State Route (SR) 520 between Interstate 405 (I-405) and Interstate (I-5). To achieve its goal, S/LWC UPA employed strategies consisting of a combination of the "4Ts" (Tolling, Transit, Telecommuting/TDM, and Technology). Operational strategies implemented on the corridor included: variable tolling on all lanes of the SR 520 Bridge across Lake Washington, enhanced bus services, transit real-time information signs and passenger facilities, real-time multi-modal traveler information, and active traffic management (ATM) signage.

The lessons learned described below come from the Volpe demographic household traveler panel survey conducted in Seattle as part of the USDOT sponsored UPA Program evaluation.
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USDO Federal Highway Administration and Volpe
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Lessons Learned on Congestion Pricing from the Seattle and Atlanta Household Travel Behavior Surveys
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