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
Longford Circuit the original track as the two bridges have long been demolished and a highway now intersects the network of roads on which the circuit was laid out. Motor sport returned to Longford in 2011 with the first running of the Longford Revival Festival which takes place on Pateena Road (The Flying Mile). There drivers get to run their cars, both road cars and historic race cars, down The Flying Mile. Longford Circuit The Longford Circuit was a temporary motor racing course laid out on public roads at Longford, south-west of Launceston in Tasmania, Australia. It was located on the northern