Excerpt from Handbook for Highway Engineers: Containing Information Ordinarily Used in the Design and Construction of Roads Warranting an Expenditure of $5, 000 to $3, 000 Per Mile; Principles of Design, Practice of Design and Construction Introductory general. Chapter I. Grades and alignment Maximum Grades Relative importance of automobile and horse traffic in the selection of grades Difficulty of ascent and ease and safety of descent The theoretical grades that fulfil certain traffic require ments and the practical considerations which govern the selection The construction of ruling grades. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.