The Interlagos circuit has long needed a major upgrade in order to stay on the F1 calendar. The track has been fortunate that, along with Canada, it has been a key race for the championship in the American time zone, but with new races coming in the United States and possibly Mexico and Argentina, there is now pressure on both Brazil and Canada to get their facilities up to F1 standard. The idea of a new pit and paddock on the back straight at Interlagos is not new and it makes perfect sense, as there are already huge existing grandstands at that point on the circuit. Moving the pits would also allow for a re-profiling of the corners on the run up to the current start-finish line, where there have been a number of very serious accidents in recent years.
It is believed that this would also require a re-profiling of the circuit at the bottom of the hill, with a new kink to the right, in order to rejoin the original circuit (which has not been used since the 1970s), which loops around the lake and then a left-right kink back on to the track on the run up the hill. F1 has been asking for the changes for around five years but with workable alternatives now available there is more bargaining power. If the work goes ahead the Grand Prix is likely to be guaranteed at Interlagos until at least 2020.