State Route 532 Route Development Plan: An Example Of Cooperative Corridor Management

Washington State Department of Transportation (WSDOT) uses a corridor planning process to guide planning for all state highways. WSDOT guidelines for these plans – termed Route Development Plans (RDPs) – emphasize strategies that support the building of the State Highway System Plan, the Department’s 20-year plan. SR 532 is a generally straight two-lane east/west state highway located about 45 miles north of Seattle, Washington. The corridor begins in rural but rapidly growing Camano Island, bisects the City of Stanwood (population 3,500), and terminates at I-5. Commuters, recreationalists, school buses, agricultural vehicles, bicyclists and gravel trucks share the road. Streets, driveways and on-street parking access the highway through the City of Stanwood, while the eastern half of the route is a limited access, high-speed facility. Most intersections on SR 532 operate at LOS E or F during the PM period, and there are no alternative east/west routes through much of the corridor. The RDP for this highway is the first in which WSDOT has incorporated the principles of corridor management outlined in NCHRP Synthesis 289 “Corridor Management: A Synthesis of Highway Practice.” This was done because the highway will be deficient in level of service within 20 years, but is not currently listed on the financially constrained 20-year plans for WSDOT, the Puget Sound Regional Council, or the Island County RTPO. Thus, corridor management principles such as access management, corridor preservation, and coordination with local circulation systems are critical to operating a safe and efficient highway. Corridor management supports the objectives of ISTEA and TEA-21 to maximize the use of existing facilities, as embodied in TEA-21 goals (F) promote efficient system management and operation, and (G) emphasize the preservation of the existing transportation system. The plan was led by a steering committee representing three jurisdictions, two transit agencies and one tribe. Public input was obtained through meetings at various locations. One unique aspect of this plan is that the steering committee will continue to meet periodically, to work toward implementing the short-term recommendations of the plan. The reader of the paper will learn how these agencies, believed to be at odds with each other, developed this plan to mutual agreement, and how some of its recommendations will be incorporated into future updates of local comprehensive plans.


  • English

Media Info

  • Media Type: CD-ROM
  • Pagination: 12p
  • Monograph Title: Eighth National Conference on Transportation Planning for Small and Medium-Sized Communities, September 18-20, 2002, Cincinnati, Ohio

Subject/Index Terms

Filing Info

  • Accession Number: 01045190
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Mar 9 2007 4:02PM