With 24 hour endurance races available in Gran Turismo 5, one of the most requested features of the game is that people are simply able to save in the middle of the race. Luckily, Kazunori Yamauchi has revealed that the team at Polyphony Digital are still at work on bringing the mid-game saves, reiterating that they are developing the update.
Saving [in] the middle of the race is under development.
Currently, players have to play endurance races in their entirety, or leave their PS3 on while they take breaks.
Of course, Polyphony Digital aren’t exactly well known for being able to develop games and updates quickly, so this patch could be quite a way off, especially considering that they are prioritizing fixing their servers.