The great majority of road races were run over a lengthy circuit of closed public roads, not purpose-built racing circuits. This was true of the Le Mans circuit of the 1906 French Grand Prix, as well as the Targa Florio (run on of Sicilian roads), the German Kaiserpreis circuit in the Taunus mountains, the French circuit at Dieppe, used for the 1907 Grand Prix and, the Isle of Man TT motorcycle road circuit first used in 1907. The exceptions were the steeply banked egg-shaped near oval circuit of Brooklands in England, completed in 1906, the Indianapolis Motor Speedway, and the oval, banked speedways constructed in Europe at Monza in 1922 and at Montlhéray in 1924.