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
Circuit Gilles Villeneuve Circuit Gilles Villeneuve The Circuit Gilles Villeneuve (also spelled Circuit Gilles-Villeneuve in French) is a motor racing circuit in Montreal, Quebec, Canada. It is the venue for the FIA Formula One Canadian Grand Prix. It has previously hosted the FIA World Sportscar Championship, the Champ Car World Series, the NASCAR Canadian Tire Series, the NASCAR Xfinity Series and the Grand-Am Rolex Sports Car Series. The venue hosted the Champ Car World Series Grand Prix of Montreal from 2002 to 2006. The Canadian Grand Prix of Formula One racing, which had taken place for 30 years at Circuit Gilles-Villeneuve, was dropped