00454966

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http://onlinepubs.trb.org...trr/1985/1006/1006-006.pdf

https://scholar.google.co...fler&publication_year=1985

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.

Publication of this paper sponsored by Committee on Track Structure System Design. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01419889

pp 38-45

1985

Transportation Research Record

0309038162

Print

Figures (9) ; References (3) ; Tables (1)

Continuous welded rail; Line extensions (Rail transit); Maintenance of way; Rail fasteners; Rail transit facilities; Railroad tracks; Specifications; Standardization; Standards

Washington Metropolitan Area Transit Authority

Design; Highways; Maintenance and Preservation; Public Transportation; Railroads; Terminals and Facilities

TRIS, TRB

Jul 31 1988 12:00AM

• A PROPOSED TRACK PERFORMANCE INDEX FOR CONTROL OF FREIGHT CAR HARMONIC ROLL RESPONSE
• DEMONSTRATION OF THE RAIL ENERGY COST ANALYSIS PACKAGE: THE ROUTE PERSPECTIVE (RECAP II)
• ESTIMATES OF RAIL TRANSIT CONSTRUCTION COSTS
• GRANULAR DEPTH REQUIREMENT FOR RAILROAD TRACK
• RESEARCH ON RAILROAD BALLAST SPECIFICATION AND EVALUATION
• TECHNIQUES FOR CONTROLLING RAIL CORRUGATION
• TRACK REHABILITATION AND NEW CONSTRUCTION IN AN OPERATING ENVIRONMENT AT BART