The subject matter presented herein has been gathered together during the past four years. My original intention was not the publication of a book, but personal study of highway engineering and the collection of such information as would find practical application in handling highway work in a modern city. In the results obtained I owe much to various officials of the District of Columbia, and especially to two, Joseph W. Dare and Vernon Cleaver.<br><br>The publication of my material is undertaken in the hope that others, finding this matter arranged conveniently in book form will be saved many laborious hours, not only in connection with details, but with the larger aspects of the problem of providing satisfactorily for the traffic of a city.