LESSONS LEARNED IN 25 YEARS OF ENGINEERING MARTA'S AERIAL STRUCTURES
In 1972, the Metropolitan Atlanta Rapid Transit Authority (MARTA) started design of a rail transit system for the Atlanta Area. 25 years later, the system consists of 45 miles (72 km) of rail lines and 36 stations. The rail line contains approximately 8 miles (12.8 km) of tunnels. The system is still expanding, with the extension of the North line another 2 miles (3.2 km) and the addition of 2 more stations at Sandy Springs and North Springs scheduled for revenue service in late 2000. Many improvements over the years have been made to MARTA's steel and concrete aerial structures in an effort to improve performance and minimize maintenance. Some specific examples of the improvements: Improved deck drainage details; improved superstructure anchor bolt and tie-down details; improved elastometric bearing design and provision for easy bearing replacement; elimination of expansion joints through use of continuous structures; better access to the interior of box girders; and, development of a standard AASHTO Girder arterial design.
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Corporate Authors:
American Public Transportation Association
1201 New York Avenue, NW
Washington, DC 20005 -
Authors:
- Beneda, R V
- McKenna, P A
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Conference:
- 1997 Rapid Transit Conference of the American Public Transit Association. Volume 3 - Way & Structures and Construction
- Location: Washington, DC
- Date: 1997-6-8 to 1997-6-12
- Publication Date: 1997-8
Language
- English
Media Info
- Features: Figures;
- Pagination: p. 147-154
Subject/Index Terms
- TRT Terms: Improvements; Maintenance management; Maintenance practices; Planning; Quality of work; Railroad transportation; Structural engineering; Suspended structures
- Old TRIS Terms: Aerial structures
- Subject Areas: Construction; Maintenance and Preservation; Planning and Forecasting; Public Transportation; Railroads;
Filing Info
- Accession Number: 00748945
- Record Type: Publication
- Files: TRIS
- Created Date: May 23 1998 12:00AM