Excerpt from Proceedings of the American Railway Engineering Association, 1983, Vol. 84 Innovative methods were proposed to ventilate the longer tunnels by using a system of intermediate air shafts, gates and fans. The design considerations for the major components of the ventilation system are briefly addressed and the problems of accessability of equipment in remote areas, and the design of tunnel gates are described. Problems associated with train operation in the tunnels are discussed, with particular reference to the effect of flushing time on overall train cycle times. Various methods of reducing cycle times for given flush times are discussed, and graphical techniques currently under development are used to determine Optimum solutions. Consideration is also given to the transient locomotive cooling problems associated with entry to and exit from the tunnels. Finally, consideration is given to methods to determine the capacity of a railway line which passes through several ventilated tunnels, in order to determine the optimum operating mode for such a network. 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.