This guide was prepared as a result of NCHRP Project 03-77.  Edwards and Kelcey served as the prime contractor.  Kenneth R. Marshall, P.E., Vice President, Edwards and Kelcey presided as the principal investigator and Phil Tarnoff presided as the co-principal investigator.  In addition to the principal and co-principal investigators, Jim Haley and Tom Jacobs and James Witherspoon of Edwards and Kelcey served as contributing authors.  Javier Ordonez served as a research assistant and provided invaluable support in the preparation and analysis of the survey of state departments of transportation procurement policies, procedures and practices.  Mr. Ordonez also developed the website that automates the decision process presented in the guide.  We would like to thank the Kentucky Transportation Cabinet, Illinois Department of Transportation, New York State Department of Transportation, Texas Department of Transportation, and Virginia Department of Transportation for participating in the survey.  This research was positively influenced by the cumulative experience and knowledge of the review panel, chaired by Larry Yermack of PB Farradyne.  Throughout the course of this project, the review panel provided critical insight and the necessary resources needed to produce this guide.  Lastly, we are especially appreciative for editorial contributions provided by the Edwards and Kelcey administrative staff.