Excerpt from the report Preface: This report considers some problems of highway preservation as illustrated by Wisconsin’s experience in connection with the hauling of fluid dairy products. It is concerned entirely with restrictions on the weight of trucks and their application to a part of the dairy industry's transportation system. This case study is intended to help marketing economists and others to understand better the complex nature of the problems involved in the economics of highway preservation. It is hoped that Wisconsin's experience will be useful as a guide to other States in dealing with similar problems.