Circuit de Monaco downhill again to a double right-hander called "Portier," named after region of Monaco, before heading into the famous tunnel, a unique feature of a Formula One circuit. (Until 2009 only one other circuit, Detroit in 1982–88, featured a tunnel, but the F1 series now includes racing at the Yas Marina Circuit in Abu Dhabi, which presents a shorter tunnel at the exit of the pit lane.) As well as the change of light making visibility poor, a car can lose 20–30% of its downforce due to the unique aerodynamic properties of the tunnel. The tunnel also presents a unique problem
Santiago Street Circuit Santiago Street Circuit The Santiago Street Circuit is a temporary street circuit located in the city of Santiago, Chile. It is used for the Santiago ePrix of the single-seater, electrically powered Formula E championship. It was first used on 3 February 2018 for the 2018 Santiago ePrix. The track is 2.46 km in length, with 12 turns. It starts in Avenue Santa María, in the northern side of the Mapocho River, crossing it on Pio Nono Bridge. After rounding Plaza Baquedano, it takes the Alameda (Santiago's main avenue) to the west until reaching the Gabriela Mistral Cultural Center, where it