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
Montjuïc circuit only female driver to score world championship points, taking 0.5 points for 6th place. Formula One never returned to the circuit after the accident. The circuit of Montjuic was also the scene of the 24 hours of Montjuic, a motorcycle endurance race. The area where the circuit was located is now part of Anella Olímpica, where many Venues of the 1992 Summer Olympics are now located. In 2004, the city council of Barcelona decided to mark the layout of the old circuit. On October 13–14, 2007 the circuit was used for the Martini Legends, to honour the 75th anniversary of