• May 31st, 2012

This user manual provides guidance for the use of the Enhanced Interchange Safety Analysis Tool (ISATe). This tool can be used to evaluate freeway and interchange safety. The algorithms and equations used in ISATe are implemented in a Microsoft ® Excel ® workbook as software (using the Visual-Basicfor-Applications programming language).

The user manual consists of three chapters. The first chapter provides an introduction to ISATe and describes basic interactions with the ISATe software. The second chapter describes the information needed for an ISATe evaluation. It also reviews the performance measures predicted by ISATe. The last chapter describes some typical applications of ISATe. The manual also contains three appendices that provide supplemental information and sample applications.