National Route 1 (Argentina)

National Route 1
Ruta nacional 1
Route information
Length	50 km (31 mi)
Existed	1995–present
Major junctions
North end	25 de Mayo Highway Paseo del Bajo in Buenos Aires
Major intersections	in Hudson
South end	in Ensenada
Location
Country	Argentina
Highway system
Highways in Argentina

National Route 1, also known as Buenos Aires–La Plata Highway and officially called Autopista Doctor Ricardo Balbín since 2004, is a highway that connects the 25 de Mayo Highway and Paseo del Bajo in the city of Buenos Aires with the Provincial Route 11, near the city of La Plata. It has a length of 50 km (31 mi) with two or four lanes on each direction in different areas, and is indicated in red in the map.

On km marker 31 it connects with National Route A004, the main road to the coastal tourist areas of Mar del Plata and others in Buenos Aires Province. The highway runs (from northeast to southeast) through the partidos of Avellaneda, Quilmes, Berazategui, Ensenada, and La Plata.

This highway is currently operated by AUBASA ("Autopistas de Buenos Aires S.A."), a state-owned company owned by the Government of Buenos Aires Province, which also manages most routes to the cities of Costa Atlántica.^{[citation needed]}