HQ Pavement Design provides assistance to WSDOT's Commercial Vehicle Services Office (CVS) by analyzing the impact of superloads over 300,000 pounds to highway pavement structures. HQ Pavement Design provides FWD testing services throughout the state. 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. HQ Pavement Design provides technical assistance and oversight of the pavement type selection process (asphalt versus concrete) and other pavement investment decisions. HQ Pavement Design supports the Regions by preparing specialized or complex pavement designs.

HQ Pavement Design ensures that the Region's pavement designs comply with WSDOT's Pavement Policy (pdf 1.87 mb), are cost effective and constructible. Flexible Pavement Design Manual Revised: January 2018 AASHTO 2002 Pavement Design Guide Design Input Evaluation. Guidelines For 1993 AASHTO Pavement Design May 2003 Pavement Design and Evaluation Section Load Transfer Factors New Pavement Designs and Unbonded PCC Overlays with Load Transfer Devices VDOT Value for Design Pavement Type Asphalt Shoulder Tied PCC Shoulder or Wide Lane Jointed Plain 3.2 2.8 Jointed Reinforced 3.2 2.8 Continuously 3.0 2. Most pavement designs produced by WSDOT originate in one of the six Regions. AASHTO Design Guide, justify the variance, and document the actions in the Pavement. All Pavement Design Requirements are included in the WSDOT Pavement Policy (pdf 1.87 mb). Based on engineering mechanics that have been validated through extensive road test performance data, the manual presents information necessary for pavement design engineers to use the MEPDG design and analysis method.

Pavement Design ensures that highway pavements are properly designed by providing the oversight, expertise and design tools required for pavement design. This manual describes the pavement design methodology termed mechanistic-empirical (M-E) pavement design.

Aashto pavement design manual