Highway is any private or public road including other public path on land. Highway engineering refers to a branch of civil engineering that focuses on designing, building, operating, planning and maintaining tunnels, roads and bridges to enable efficient and safe transportation of goods and people. It considers aspects like future traffic capacities, highway intersection designs, geometric alignment, design and material of highway pavement, its thickness, and maintenance. The assessment of existing and future traffic capacities on a road network is part of highway planning. During the design phase, the best location, shape and alignment for a highway are chosen. This book includes some of the vital pieces of work being conducted across the world, on various topics related to highway engineering. It is appropriate for students seeking detailed information in this area as well as for experts.