Ruta Nacional 3 ("National Route 3") is an Argentine highway, stretching from the eastern side of the country in Buenos Aires, crossing the provinces of Buenos Aires, Río Negro, Chubut Province, Santa Cruz and Tierra del Fuego. Since its start at Avenida General Paz (A001) until the end, on the bridge over Lapataia River, it measures . The road is interrupted between km 2674 and 2696, due to the presence of Magellan Strait, which forces access between Santa Cruz and Tierra del Fuego Provinces through Chile, over Ruta CH-255 and Ruta CH-257 paved north of the strait and another paved and treated long south of it. The crossing of the Magellan Strait is done in 20 minutes through the use of a ferry traversing the width of at that point. After National Decree 1931 of 3 August 1983, this road is called Comandante Luis Piedrabuena south of National Route 22, that is starting at km marker 719. Cities These are the main (over 5,000 inhabitants) cities and towns joined by this route, North to South. In the provinces of Santa Cruz and Tierra del Fuego towns under 5,000 inhabitants are marked in italics. Buenos Aires Province Length: (from km marker 14 to 963). La Matanza Partido: San Justo (km 17), Isidro Casanova (km 19), Gregorio de Laferrere (km 26), González Catán (km 32), Virrey del Pino (km 38). Marcos Paz Partido: no towns over 5,000 people. Cañuelas Partido: Cañuelas (km 63-66). Monte Partido: San Miguel del Monte (km 109-112) General Belgrano Partido: no towns over 5,000 people. Las Flores Partido: Las Flores (km 187). Azul Partido: Azul (km 299). Benito Juárez Partido: Benito Juárez (km 399-401). Adolfo Gonzales Chaves Partido: Adolfo Gonzales Chaves (km 450). Tres Arroyos Partido: Tres Arroyos (km 491-496). Coronel Dorrego Partido: Coronel Dorrego (km 593). Coronel Rosales Partido: no towns over 5,000 people. Bahía Blanca Partido: access to Port of Ingeniero White (km 677) over National Route 252, Bahía Blanca (km 681-695), access to General Daniel Cerri (km 698). Villarino Partido: no towns over 5,000 people. Patagones Partido: Carmen de Patagones (km 962). Río Negro Province Length: (km 963-1304) Adolfo Alsina Department: Viedma (km 966). San Antonio Department: access to San Antonio Oeste (km 1139) and Sierra Grande (km 1265). Chubut Province Length: (km 1304-km 1856) Biedma Department: access to Puerto Madryn (km 1394). Rawson Department: Trelew (km 1451) and access to Rawson (km 1456). Gaiman