In recent months there has been talk from various quarters about using existing stadia as part of new Formula 1 circuits. The first mention came from Mexico City, where they are in the process of tarting up the old Autodromo Hermanos Rodriguez, with the plan being to run the track into and out of the Foro Sol stadium, which was built inside the Peraltada Corner in 1993. The object of this is to use existing seating and thus save money on seating elsewhere. The downside is that the design is restricted to the space available and often stadia do not have sufficient size to house a meaningful series of corners. It is also not possible to build the pits and paddock on a stadium because of the space required and the need for the stadium to be used for other things at other times. In racing this has been done on several occasions, notably at the Norisring in Nuremburg where the DTM uses the decaying Steintribune where Adolf Hitler and the Nazi Party held their celebrated Nuremburg Rallies in the 1930s.
The idea has also been suggested in Cape Town and more recently in Sochi, Russia, where the Winter Olympic Stadium has also been considered as part of the planned track. This creates the same compromises.
The latest idea being reported is the old chestnut of the London Olympic Park being turned into a race track. The idea has been kicking around for years, but the roads were not designed with the concept in mind so it would be another botch job. The idea has been put forward by a company called Intelligent Transport Solutions Ltd.