WinPAS 12 is compatible with all versions of Windows, including Windows 7, and both  architecture types (32/64-bit).

WinPas 12, which is based on the commonly-used AASHTO 1993 pavement design guide, has been updated to make it compatible with current Windows-based operating systems, has a new GUI (or graphical user interface), and includes updated help screens which make the software easier to use than ever before.

WinPas 12 is available as a free download and may be used without a license for up-to 30 days.  The complete install package and patches were updated on (2/27/14).

Installation Instructions

  1. Unzip the contents of the downloaded file (WinPAS
  2. Run Setup.exe
  3. Follow the installation wizard instructions

Download SoftwarePurchase a License

If you already have WinPas 12 installed, you can download and run a cumulative patch update to get the latest changes to WinPAS 12. See patch change log for details.

Patch Change LogWinPAS 12 Cumulative Patch 32 BitWinPAS 12 Cumulative Patch 64 Bit

Contact for Software Support

Please contact your local ACPA Chapter/State association for information on standard local design practice. Such information is invaluable for determining the correct input values to use with StreetPave