Provincial Route 11 (also named "Interbalnearia" after its new path was completed in 1979)[1][2][3] is a 583-kilometre-long (362 mi) Argentine road in the East of Buenos Aires Province.

[4] Route 11 runs along the coasts of the Río de la Plata and the Atlantic Ocean, with a high number of car passing the road during summertime.

This road contributed to development of the cities situated on the Buenos Aires Province coast at the Nort of Mar del Plata, due to the only town of the region reached by railway was Pinamar.

[19] During 1996 the concessionary built a dual carriageway between the cities of Pinamar and Villa Gesell, financed by an increase of the toll rates which was made effective once the works finished.

[21] In July 2011 the Government of Buenos Aires trespassed the management of the Route 11 to "Autovía del Mar" for a term of 30 years.