In 1986, Mayor Morales Ehrlich closed streets in the downtown of the city to create a large pedestrian mall, which has resulted in chronic traffic congestion. Since 2009, Mayor Norman Quijano has worked for the redevelopment of parks and historic buildings in the "Rescate del Centro Histórico", which involves the removal of street vendors. This has led to several riots in the area, but he has managed to place the vendors in new markets where they can operate their own stalls. The Chapultepec Peace Accords were signed on 16 January 1992, ending 12 years of civil war. The signing is celebrated as a national holiday with people flooding downtown San Salvador in the "Plaza Gerardo Barrios" and in La Libertad Park.