equipment that will control the ventilation and traffic regulation. The tunnel will have more buildings at both ends, which are now installed automatic controls of the twin tunnels. A house, central control, was built near the side of the tunnel Greater Caracas, where electrical panels were installed specifically designed to regulate the ventilation lighting, traffic, and warning signs of both tunnels. In this building, there is always ready to guard crews clear the highway tunnels and of any accident or interruption that may occur. Viaducts One of the viaducts along the route, known as Viaduct #1, was plagued by gradual landslides from the 1980s onward. During the 1967 Caracas earthquake, it suffered severe deformations due to the displacement of the hill and the failure of Gramoven Tacagua. The bases of the supports shifted toward the centre of the span, causing the supports to crack and the span to buckle upward. Venezuelan governments made constant repairs to strengthen the supports and stabilize the span, but did not develop a long-term solution. The government closed the highway as a safety precaution on 5 January 2006. The sudden isolation of Caracas from the coast prompted political accusations by the opposition against Hugo Chávez's government, and by Chávez supporters against previous governments' failure to deal with the problem. A narrow and steep detour around the viaduct opened on February 28, and the viaduct span fell on March 19. Construction began in March 2006 on a replacement viaduct, which opened on 21 June 2007. The current Viaduct 1 has a length of . Viaduct 2 has a length of . Viaduct 3 has a length of . References Roads in Venezuela