The study under consideration relates to the ventilation of two distinct and separate subway tunnels: the Broad Street Subway and the Market-Frankford tunnel. The Broad Street Subway consists of a four-track tunnel with operation on all four tracks during rush hour, extending from Girard Ave. to north of Susquehanna-Dauphin Station. The tunnel study on this section included 11210 ft. with 35 vent shafts, 5 stations, 50 line sections and 86 nodes. It covered the section from Fairmount Station to the end of platform at North Philadelphia. The second section of Broad Street is a two-track tunnel starting from Snyder platform to the end of Walnut-locust. The simulation covered a length of 9700 ft. with 56 vent shafts and 10 stairs. Three of the five stations covered had mezzanines. The third section covered the Market-Frankford tunnel extending through the city in an east-west direction. The Market Street subway is a double-track tunnel with 5 stations and no vent shafts covering 5900 ft. in length from Second thru 13th Street. Previous studies of the Philadelphia Subway ventilation indicate that responsible agencies have for some time expressed concern of balancing cost of ventilation equipment with the benefits of passenger comfort and safety. In view of impending station rehabilitation the overall problem of subway ventilation is being examined with the aid of recent developments in the field of data processing and environmental simulation programs. Therefore, the objective of this study was to use the computer simulations and verify those with field measurements. Existing cars running on the indicated transit lines were simulated during the summer evening rush hour. (Author)

  • Corporate Authors:

    De Leuw, Cather and Company

    Suburban Station Building
    Philadelphia, PA  United States 
  • Publication Date: 1979-12

Media Info

  • Features: Appendices; References;
  • Pagination: v.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00334522
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 28 1982 12:00AM