The San Francisco Connection
An underground switchyard and storage facility for San Francisco's Municipal Railway challenged the limits of both cut-and-cover and tunneling in loose soil. The project was...
Burrowing Beneath Bangkok
The $2.9 billion Bangkok subway project faces several daunting obstacles�soft soils, a high water table and Thailand's current economic upheaval. The Blue Line subway system...
Big Digs Around the World
This proceedings,
Below Boston's New Bridge
The Charles River Bridge, a 10-lane cable-stayed structure will be the widest cable-stayed bridge in the world. The bridge is 1,460 ft long with a main span between towers of 745 ft. This...
Compensation Grouting
To minimize ground movement while tunneling a sewer 5 m below Toronto's Spadina subway line, engineers used special instrumentation, tunneling control and grouting to limit...
Cutting Off Water in Queens
New York's Transit Authority wanted to dig a new tunnel for a Queens subway connection, but first contractors had to wall-off the potentially contaminated groundwater nearby....
Lining the Line
Having succeeded in achieving dry stations and tunnels in mined construction, flexible waterproofing membranes are now being used to waterproof cut-and-cover subway stations and old, leaking...
Green Light
Construction of the $718 million Metro Green Line, the latest addition to the Los Angeles County Metropolitan Transportation Authority's rail plan, required flexible coordination...
Seeking Structural Solutions
A photo essay on the unique work of Santiago Calatrava, a Spanish-born engineer and architect whose bridges and buildings have attracted international attention for their unusual esthetics....
Soft-Ground Subway Construction
With its 89.5 route-mile system up and running, the Washington Metropolitan Transit Authority (WMATA) is now completing the $640 million Mid-City E Route. The new line presented formidable...
The Human Side of L.A. Metro
Encino, Calif.-based photographer Ken Karagozian was given access to the construction of L.A. Metro's Red Line. Karagozian tries to capture not only the scope of the work...
Portland's Light Rail Goes Underground
A 29-km extension of Portland's first modern light rail system nears completion. The extension includes a 4.6 km twin-tunnel section and the deepest transit station in North...
Piggyback Tunnels
Coincidental alignments of the Central Artery Tunnel and the Transitway subway line under the streets of Dewey Square in Boston presented the sponsoring agencies with a rare opportunity...
Rest in Peace
Engineers working on a subway connection project in the nation's capital successfully employed chemical grouting techniques--some never tried before--to protect a historically...
Deep Dig, Tight Squeeze
Since it opened in 1928, the North Station/Boston Garden Complex has secured a firm place in local history. Boston Garden, home of the Bruins hockey and Celtics basketball teams, has been...
Planes, Trains and the Games
Olympics-related construction in Atlanta isn't limited to sports facilities. The city is also gearing up for the 1996 Summer Games by accomplishing some major transportation infrastructure...
Transit Network Modelling?A New Approach
London's underground is one of the world's largest heavy-rail underground systems. London underground Limited (LUL) is the main rapid transit operator in London, and is financed directly...
Single-Shell Shotcrete Method
On a 60-m-long test stretch in the course of the construction of the Munich Subway the single-shell jointless shotcrete method was employed. In this case the standard cross section of...
Sensitivity Analysis of Financial Forecasts for MBTA Infrastructure Investment Program
This paper describes a financial analysis methodology and model developed for the Massachusetts Bay Transportation Authority (MBTA), which provides comprehensive projections of the relationships...
Automatic Vehicle Location at Seattle Metro
Seattle Metro has issued final acceptance on a signpost-based AVL system. The system has been well received by operators and by service communications coordinators. Metro has taken steps...
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