Extending monetary values to broader performance and impact measures: Transportation applications and lessons for other fields.

This article examines recent progress at assigning monetary values to what are normally considered "hard to quantify" benefits of transportation projects. It focuses on three types of impacts - environmental quality, health and wider economic impacts - to examine how transportation project evaluation methods have evolved in recent years and how they compare to methods used for evaluation of non-transportation programs. Examples of recent practice are provided to show how transport agencies are continuing to refine performance measures to include broader impacts in project evaluation.