Underground railway in Washington, U.S.A.
DOI:
https://doi.org/10.3989/ic.1979.v32.i313.2455Abstract
This article describes the works involved in the first stage of the Washington Underground (Subway) system which was begun in 1969 and scheduled for completion in 1983 and is the most modern metropolitan railway in North America. Lines have double track and will carry three million passengers daily. Different construction methods have been used throughout: tunnel formed try digging a trench then roofed and covered, excavated tunnel and elevated structures. Stations features answer to the strictest demands, provided with closed circuit television, air conditioning, noise dampening Systems, special access ways, fire protection Systems and automatic traffic control. Special attention is given to the two bridges over the Pentagon and over the Anacostia, pointing out their differences and the elevated structure at the National Airport.
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