San Francisco, May 20, 2008 - Thornton Tomasetti, Inc., the international building engineering and technology firm, has been contracted to provide structural design services for the new Transbay Transit Center in San Francisco, Calif.

In September 2007, Pelli Clarke Pelli Architects was selected for the design and development of the Transbay Transit Center at First and Mission streets in San Francisco. The Los Angeles and New York offices of Thornton Tomasetti will join the architect's team on this project that will consist of a new transit terminal topped by a public park.

Courtesy Pelli Clarke Pelli Architects

The new Transbay Transit Center will centralize the region's transportation network by accommodating nine transportation systems under one roof, including AC Transit, Caltrain, MUNI, Golden Gate Transit, SamTrans, Greyhound, BART, WestCAT, and future California High-Speed Rail. The 40-acre redevelopment area surrounding the Transit Center will be developed to include housing, retail, and an adjacent tower poised to redefine the city's skyline.

Transbay Transit Center aspires to become one of San Francisco's great civic places. Its architecture is open, full of light and clean air, and environmentally sustainable. As the centerpiece of a new neighborhood, the design team has proposed transforming the roof of the Transit Center into a public park--City Park. The 5.4-acre City Park will be accessible and inviting, complete with the attractions and activities that characterize great urban green spaces. The park also actively improves the environment around the Transit Center, absorbing pollution from bus exhaust, treating and recycling water, and providing a habitat for local wildlife.

About Thornton Tomasetti (www.ThorntonTomasetti.com)
Thornton Tomasetti provides building engineering services to clients worldwide on projects of all sizes and complexity. From the tallest buildings and the longest spans, to innovative building systems and materials, the firm is committed to creating the best solutions through its technical ingenuity, pursuit of excellence, and responsiveness to client needs.

Founded in 1956 as Lev Zetlin & Associates, today Thornton Tomasetti is a 650-person organization of engineers and architects, collaborating from offices across the United States and in Hong Kong, London, Moscow, and Shanghai. Services cover structural design, building evaluation, and remediation to optimize building efficiency and performance. Thornton Tomasetti mobilizes rapidly to provide disaster response investigations, and delivers expert consulting services and testimony for legal and insurance purposes.

About Pelli Clarke Pelli Architects (PCPA) (www.pcparch.com)
Established in 1977, Pelli Clarke Pelli Architects (PCPA) has designed over 80 million square feet of urban, mixed-use projects for prestigious government, private, and corporate clients worldwide. The firm's extensive portfolio includes the world's largest private developments: Canary Wharf in London, World Financial Center in New York, International Finance Centre in Hong Kong, and Kuala Lumpur City Center in Malaysia and such significant transportation projects as Reagan National Airport in Washington, D.C., Haneda Airport in Tokyo, Canary Wharf Docklands Light Railway Station in London, and Richardson International Airport in Winnipeg. PCPA is committed to being a leader in environmentally responsible design.

Beginning in 1994 with the design of the LEED EB Silver Owens Corning Headquarters, PCPA has designed many significant LEED rated projects, including the Solaire, the first LEED Gold high-rise in the United States. PCPA has been honored with numerous awards, including the AIA's two most prestigious awards: the 1989 Firm Award and the 1995 Gold Medal for Cesar Pelli. In 2004, the firm was awarded the Aga Khan Award for Architecture for the design of the Petronas Towers.

Contact
Great Ink Communications - 212-741-2977
Eric Gerard/Deborah Geiger

Thornton Tomasetti - 917-661-7800
James M. Kent, JKent@ThorntonTomasetti.com

Pelli Clarke Pelli - 203.777.2515
Janet Yoder, jyoder@pcparch.com