Excerpt from The Traffic Problems of Interurban Electric Railroads: A Thesis Presented to the Faculty of the Graduate School of the University of Pennsylvania in Partial Fulfilment of the Requirements for the Degree of Doctor of Philosophy Electric railways can be grouped into four main classes - the urban, suburban and interurban systems, and the electrified divisions of steam railroads. The first, and the type earliest established, is the street car line originally operated by horse power, and now by electricity and located in cities and large towns. The system almost always lies within the city limits, and is generally circumscribed by the thickly settled districts. The cars are run at low speeds, making stops at every street intersection. 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.