Manual of recommended practice for railway engineering and maintenance of way (1905)
American Railway Engineering and Maintenance-of-Way Association · Chicago, Ill. : The Association · leaf 162
feet. Fig. 25 is a plan recommended for location of automatic signalson a four-track railroad when grade will not allow the signals to co-incide and the two running tracks are signaled independently of therunning tracks in opposing direction. Fig. 26 is a four-track arrangement recommended to be… … z
Railroad engineering · Railroads
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
