I had Indy freeze a few times and I did a few of the following.
Try deleting the system cache, you could try disabling your internet connection, clean the dust out of your ps3 with canned air or a grounded vacuum (meant for electronics). After I cleaned mine its running cooler (the higher speed fan hasn't kicked in at all yet) and it had quite a bit of dust in it.
You might want to avoid that track for a bit, and come back to it later.
You could also try deleting the game data (not the game save) and reinstalling it.
