PaveXpress, a free, online pavement design tool created with support from the National Asphalt Pavement Association and the State Asphalt Pavement Associations, has launched an update including an asphalt overlay design module.
Version 2.0 of PaveXpress “makes it easy to design asphalt overlays that preserve a pavement’s structure while improving smoothness, safety, and drivability.” The Asphalt Pavement Alliance has scheduled a webinar introducing the new module for July 29, Aug. 6 and Sept. 9. Registration is available at www.asphaltpavement.org/webinar.
To provide designs for flexible and rigid pavements, the tool requires basic inputs such as layer thickness and subgrade soil type, and provides “industry-accepted” default values. These values can be adjusted as needed to meet “locally calibrated” figures.
The overlay module is based on guidelines from Chapter 5 of the 1993 American Association of State Highway and Transportation Officials (AASHTO) Guide for the Design of Pavement Structures. It evaluates the “existing pavement structure prior to placing an overlay with different decision pathways for condition surveys or non-destructive testing.”
PaveXpress, developed by Pavia Systems, was first introduced last September and has had more than 5,000 users in that time. The tool is available at www.pavexpressdesign.com.
