1928 Grand Prix season

The 1928 Grand Prix season saw the Monegasque driver Louis Chiron take seven Grand Prix victories whilst driving for the Bugatti team.

During the 1928 Italian Grand Prix in Monza a serious accident involving the car of Emilio Materassi: his Talbot crashed at 200 km/h into the grandstand, killing Materassi and 21 other people.

This event brought to evidence the need for better safety measures at the Italian circuit. The following two seasons the Italian Grand Prix wasn't held, while the Monza circuit underwent a complete upgrade.

The Indianapolis 500 counted towards the AAA Championship Car title.

...
Wikipedia