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 (10[2])caused its 2000 opening to be pushed back. (-5[1])Aeroelastic flutter, not resonance as commonly believed, was the cause of the 1940 (10[1])rupture of one of these (10[1])structures in Tacoma. (10[2]-5[1])A (10[1])triangular truss (10[1])is often (10[1])used in these structures (10[1])to mitigate buckling. Unlike in a viaduct, a catenary is formed by the cable that supports the deck of the suspension type of these structures. (10[1])For 10 points, name these structures that span a river. ■END■ (10[1])