<p>Urban Bridges</p><p>Biloxi I-110</p><p>Biloxi I-110, an elevated connection linking I-10 and U S #90 represents a design solu- tion to accommodate the expansion of interstate systems in a developed urban area within minimal right-of-way. Construction was accomplished from above in order to mini- mize traffic interruptions. Openness of the superstructure and slender piers minimized impact to the established community. The precast concrete segmental design saved the owner $4.2 million over the alternate cast-in-place design solution and opened to traffic in 1988. The bridge has endured severe tropical weather, including Hurricane Ivan, a Category Five storm in 2005. Urban Bridges</p><p>I-93 Ramps and Viaducts</p><p>Existing roadways, limitations established by nine sets of commuter rail tracks and an existing concrete plant required that the viaducts form a large loop in order to move traf- fic efficiently in and out of Boston. Horizontal curvature as tight as 212’ was required on the I-93 ramps and viaducts north of Boston, the tightest curves of any concrete seg- mental bridge in America. A savings of more than $27 million was achieved when this precast concrete segmental design was bid against a steel design. </p><p>The American Segmental Bridge Institute recognized this bridge with a 2003 Bridge Award of Excellence. It has received two additional awards. Urban Bridges</p><p>Lee Roy Selmon Crosstown Expressway Expansion</p><p>This sculpture in the sky successfully addressed congestion on a major commuter route, cutting trip times by more than half. Six lanes of capacity (three reversible lanes) are on 6’ wide piers in the existing median of the existing expressway in this urban envi- ronment. This functional sculpture design sets a new standard for solving highway con- gestion.</p><p>The International Bridge, Tunnel and Turnpike Association (IBTTA) selected the expan- sion of the Lee Roy Selmon Crosstown Expressway for their 2007 President’s Award for Excellence, as the top toll project in the world. The project has earned 13 industry awards and seven community awards. Urban Bridges</p><p>San Antonio “Y”</p><p>San Antonio "Y" bridges (carrying I-10 and I-35) exemplify the value of precast seg- mental bridges for use in restricted urban areas. The structures, the first precast seg- mental concrete elevated interstate in Texas, were built within the existing right-of-way over traffic as Interstate traffic was maintained nearby. Three contracts totaling 1.3 mil- lion square feet were built at a cost of $65.4 million, saving the owner 11.6% from the al- ternate design when it was bid in 1984. Urban Bridges</p><p>17th Street Bridge</p><p>As the "Gateway to Fort Lauderdale", the new 17th Street Causeway pro- vides a signature bridge for this visually stimulating city. The new bridge was constructed on the same alignment as the existing bridge in order to maintain the connecting roadway alignment and reduce right-of-way costs. This was accomplished through staged bridge construction. The bridge fea- tures the first ever design of an open bascule pier with unique precast seg- mental approach spans, making the bridge an exciting and special en- trance to Fort Lauderdale. Unique carina piers were the result of the com- munity-chosen "timeless/contemporary" theme.</p><p>FIGG led two design charettes with area residents to gain their input on 40 design elements. Consensus voting was used to determine a variety of bridge features including shapes, colors (soft white to reflect the south Flor- ida sun), lighting and other aesthetic items.</p>