The purpose of the study is to identify various problems which are likely to arise during highway metrication and to prepare a detailed plan for research aimed at solving conversion problems. Volume 1 contains a discussion of pertinent information related to highway metrication obtained from literature searches, interviews, and correspondence. Problem areas are defined and a program for further research is presented. Volume 2 contains appendixes to the material presented in Volume 1. These include a general bibliography, an annotated bibliography, lists of organizations contacted through written correspondence, summaries of interviews conducted by the research team, and selected plan pages for the Ohio Department of Transportation's Metric Project 3 (PER-188-3.84).