Computer-aided design of these structures can use a LUSAS (“lusas”) software package named for them. James Warren is best known for patenting a ubiquitous design of these structures. Arup added 89 dampers to one of these structures after synchronous lateral excitation caused its 2000 opening to be pushed back. (10[2])Aeroelastic flutter, (10[1])not resonance as commonly believed, was the cause of the 1940 (10[2])rupture of one of these structures (10[2])in Tacoma. A triangular (10[1])truss is often used in these structures (10[1])to mitigate buckling. (10[1])Unlike in a viaduct, a catenary is formed by the cable that supports the deck of the suspension type of these structures. For 10 points, name these structures that span a river. ■END■