Increasingly, national parks are purchasing and operating buses and other alternative transportation vehicles to transport visitors to and from or within park boundaries. Selecting alternative transportation vehicles is a complex, multi-faceted process that involves the careful analysis of numerous factors. This material in this report originally was developed as a primer to orient park superintendents and transportation managers who participated in an Alternative Transportation Vehicle Workshop held March, 2002 in Estes Park, CO. It provides useful information and supplements Volume 1 (Candidate Vehicle Technologies) of the Federal Lands Alternative Transportation Systems Study.1 This updated version contains the essentially the same material provided to the workshop participants.