Determination of the In-Situ Subgrade Resilient Modulus And Effective Structure Number of VDOT Interstate Network

Project No: 77209

Target Completion Date: June 16, 2008 Pavements

About the project:

VDOT uses the 1993 AASHTO pavement design guide for the design of its new or rehabilitated pavement structures. The AASHTO guide is based on empirical relationships that were developed during the 1950s as a result of the AASHO road test. As VDOT moves to implement the Mechanistic-Empirical (M-E) design guide, characterizing existing pavement conditions, including the resilient modulus of the subgrade, is an enhancement of the input level compared to using the M-E default values.

Project Team

Co-Principal Investigators

Last updated: July 5, 2023

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