Costanera Norte (Spanish: Northern bank road) is a 43 km privatized expressway (autopista urbana) in Chile, connecting northern Santiago from east to west, along the northern bank of the Mapocho River, using an electronic toll collection system. It was inaugurated on 12 April 1999.
Map of Costanera Nte., Regi%C3%B3n Metropolitana, Chile
The expressway connects Santiago's wealthiest districts with the downtown and the airport.
References
Costanera Norte Wikipedia(Text) CC BY-SA