The Highway/Utility Guide is dedicated to the memory of Mr. James A. Carney (Federal Highway Administration) who recognized a need, envisioned this publication, and contributed generously of his time and technical expertise towards its completion. For many years there has been a need to assemble, under one cover, state-of-the-knowledge guidance on the better practices being employed to address the full array of issues which can arise from highway and utility facilities sharing common right-of-way. The Highway/Utility Guide is such a document. It provides useful information relevant to joint use issues, a historical perspective, and good current practices. Issues addressed in the Highway/Utility Guide include: planning and coordination, design, permits, information management and mapping, notification procedures, legal, safety, construction, maintenance, reimbursement, and others.