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
Putrajaya Street Circuit overtaking zones. I can’t really see anyone making a lunge into 1 – it’s not enough of a brake really." Putrajaya Street Circuit Putrajaya Street Circuit is a street circuit which was first used on 22 November 2014 during the second ePrix of Formula E. The start-and-finish straight runs on one of the major highways – Persiaran Perdana, or Putrajaya Boulevard – and just north of the circuit is the Perdana Putra housing the Prime Minister's Office. The track is 2.56 km in length and features 12 turns. It was designed by British architect Simon Gibbons, who brought experience of