In 1969 the opportunity to design the construction of a completely new transit track system using the latest technology occurred with the decision to construct the Washington Metropolitan Area Transit Authority Metro system. The system offered the track designer a wide spectrum of challenges. The 101 route miles of double track system included underground structures of several types, at-grade track, and several extensive aerial structures. In the 15 years since the first phase of Metro track was designed, many of the design features have evolved from their original concept to significantly different concepts as a result of construction problems, maintenance problems, and new developments. Presented here are brief descriptions of these evolutions with respect to direct fixation track including grout pads, anchorage systems and the fasteners themselves, rail, rail welding, ballasted track tight radius curves, and special trackwork designs including inserts and methods of support.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 38-45
  • Monograph Title: Track design and construction
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00454966
  • Record Type: Publication
  • ISBN: 0309038162
  • Files: TRIS, TRB
  • Created Date: Jul 31 1988 12:00AM