Endurance racing (motorsport) these classes continued to embrace the endurance format. Multiple drivers per car was an early adaptation as the rigors of endurance racing quickly overcome the abilities of most racing drivers to compete solo, although solo attempts on 24 hour races like Le Mans would continue into the 1950s. The various endurance formats were appealing to manufacturers, not only as alternatives to the expense of Grand Prix racing, but also because of its increased relevance to road going models. In automobile endurance racing, three events have come to form a Triple Crown. They are considered three of the most challenging endurance
Endurance racing (motorsport) the Coppa Florio was co-organized with the Targa Florio near Palermo, Sicilia, running four or five laps, 108 km each. The Targa Florio was an open road endurance automobile race founded in 1906- the track length of the last decades was limited to the 72 kilometres of the Circuito Piccolo delle Madonie, which was lapped 11 times. The Mille Miglia was an open-road endurance race which took place in Italy 24 times from 1927 to 1957. The world's first organized 24-hour automobile race event was held on a 1-mile oval track at Driving Park, Columbus, Ohio on July 3–4, 1905.