State Route 91 Study Products

This page provides on-line access to the results of the Cal Poly SR 91 impact study, which was conducted to understand the traffic and travel behavior consequences of opening the SR 91 Value-Priced Express Lanes. The study products include the principal study reports and data sets compiled during the work. The investigation addressed changes which occurred through more than a five year period, from 1994 (about a year and a half before the Express Lanes opened in December 1995) through 1999. The period of observation concluded in late 1999.

Click here to access the study final report (Dec. 2000) .

Warning: The Dec. 2000 report is 2.436 MB -- slow communication links beware!

Click here to access the initial study report (May 1998) .

Click here to access and download study data.

To access some of this information, you will need the Adobe Acrobat Reader plug-in, which by clicking on this link may be downloaded at no cost. If you attempt to open a file requiring Acrobat Reader and you do not have it installed, your browser will probably direct you to install it at that time.

You may click here to access the SR 91 study home page, which provides a variety of related information about the California State Route 91 Value-Priced Express Lanes and the Caltrans/U.S.DOT-funded impact study conducted at Cal Poly.