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