Excerpt from California Highways and Public Works, 1948, Vol. 27 Today the 1948 estimate for California vehicle registra tion is of all types, and in the design of highway facilities consideration must be given to the characteristics of the 100 hp. Pleasure car and the heavy duty diesel truck and trailer. This design calls for heavy pavements, concrete structures, railroad grade separations - and on freeways, interchange structures. Improvements and construction of this nature cost money. Back in the early twenties satisfactory roads could be built at costs ranging from to per mile. Today two lanes of Portland cement concrete pavement cost per mile for pavement only without any other items of work. Oh a divided four-lane highway, if con structed of Portland cement concrete, the pavement item alone will amount to per mile. 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.