Excerpt from Highway Transportation Barriers in 20 States However, widely divergent tax loads and size and weight limits do constitute a bar highway transportation. This is especially true of siée and weight limits, in that a tr operator must meet many different requirements in moving from State to State. 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.

Excerpt from Highways and Highway Transportation The following pages on Highways and Highway Trans portation do not pretend to be an exhaustive treatise on the subject, but rather a glimpse of the vast development ofthe humble road and its office as an agency for transportation. Possibly the grandeur of the mountains is best appreciated by one who lives among them, who climbs their acclivitous heights, who daily experiences their power and majesty, and measures their magnitude by grim muscular exertion. But, even so, it would be foolish to contend that he who gets his information from the seat of a Pullman car receives no benefit from the hasty glimpse, or, that his imagination is not quickened and cultured by the experience. In writ ing this book, then, I have had constantly in mind the myriads of people who have not the time, and possibly not the facilities, to search the pages of the literature of the past for the origin and development, or to work out their present importance, of our amplification of roads and of road uses. It is felt that many of these people laudably desire a conversational knowledge of the origin, evolution and present status of highway transportation, even though it be glimpsed by a'very rapid passage through a very large subject. The primary objects have therefore been, to sketch briefly and simply the development of the transportation systems of the United States, to indicate their importance and mutual relations, to present some practical methods used in the operation of highway transport and to make occa sional suggestions for the betterment of the road as a usable machine for the benefit and pleasure of mankind. 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.

Excerpt from Highway Transportation Re-Makes America Outstanding in the progress of highway transportation in recent years is the uplifting of safety standards. Highway fatalities during the first half of 1939 were about a fifth less than they were a few years ago. At that rate, more than lives are being saved annually because of these improved safety condi tions, and the outlook is that continued progress in that direction will be made in the future. Better motor vehicles and better roads, plus a driving public which is becoming educated to the simple rules of safety, are making highway transportation safer. To day it is safer to ride a mile in an automobile than ever before, despite the great increase in highway traffic. 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.

Excerpt from Public Roads, Vol. 20: A Journal of Highway Research; March 1939 During the traffic test the water level was gradually raised until a height of 4}e inches above the top of the sub-base was reached at wheel-trips and this water elevation was maintained to a total of wheel-trips. Under these extreme conditions sections 2 and 3, because of their increased density, absorbed only and percent more moisture than they had contained at wheel-trips and section 4 actually showed a loss of percent moisture. All three sections were quite stable-throughout the test in marked contrast to their behavior from to wheel-trips when each absorbed approximately 3% percent of water and became highly unstable because of insufficient compaction. N o difficulties such as those encountered in connection with series 1 were encountered during the compaction of the materials of series 2 because, as previously stated, the original moisture contents were high enough to allow for appreciable drying during compaction. Thus compaction was able to proceed to the maximum density obtainable under traffic before the moisture content passed below the optimum. 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.