Control of the Subway Environment

This paper addresses the overall subject of environmental control in the subway portions of rapid transit systems. A review of the history of subway environmental control along with an updated report on the recent research work conducted under the auspices of the Transit Development Corporation, the U.S. Dept. of Transportation and the subway operating properties is included. To conclude the paper, a presentation is made of the analytical work presently being pursued for the system under design in Atlanta.