A properly design and constructed pavement is on that allows traffic to move over it safely and efficiently at the lowest cost over time.  The pavement Design Section of the Headquarters Materials Lab ensures that highway pavements are properly designed by providing the oversight, expertise and design tools required for pavement design.  All Pavement Design Requirements are included in the WSDOT Pavement Policy.

Pavement Design Requirements

• Pavement Design Considerations
• Pavement Type Selection
• New Pavement Design
• Pavement Rehabilitation
• Pavement Design Reports

Falling Weight Deflectometer

The Falling Weight Deflectometer (FWD) is a non-destructive testing device used to complete structural testing for pavement rehabilitation projects, research, and pavement structure failure detection. FWD enables the WSDOT to determine a deflection basin caused by a controlled load. Results make it possible to treat pavement structures in the same manner as other civil engineering structures by using mechanistically based design methods.

Software Programs

FWD Area Software
FWD Software Read Me



Everseries Software
Everseries Read Me


WARNING: The FWD Backcalculation Software may not work on computers running VISTA or Windows 7.

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