Transportation Maps

Bridge Seismic Retrofit Needs By County

Washington State Department of Transportation (WSDOT) data was used for developing county views of the state. Original data sets were obtained from the WSDOT Bridge Design Office and current asset management systems. Hundreds of maps such as these are created on a regular basis for quick statewide analysis of the WSDOT programs, projects, and funding scenarios.

This map depicts single and multiple column bridges that are due for seismic retrofit. Retrofitting in most cases allows a bridge to remain operational for movement of people and goods after a catastrophic event. Bridges within the seismic program are categorized in four major groups based on the potential risk of failure. The map was developed as a tool to determine areas where future congestion relief efforts and planned projects could address current seismic retrofit needs.

Washington State Highway Features That May Impede Truck Movements

Data for this map was compiled from several different WSDOT offices including the Bridge Design Office and the Freight Office. Curves were determined based on the American Association of State Highway Transportation Officials' Green book formula for calculating the appropriate turning roadway width for trucks.

The map shows various factors that may impede truck movement on the state highway system. It is intended as a tool for determining areas where freight problems may exist and as an aid for developing projects that may improve the efficiency and safety of freight movement. Maps such as this are used on a regular basis at WSDOT for statewide program and asset management analysis of the highway system.