5 hours in and we've only had about 3 crashes they seem to always happen on the highway when reaching top speed. The game play so far is addictive, the extra stuff to do put most open word games to shame.
I've had a couple myself, before using the trainer. The trainer can crash the game too if you keep using the keys for the trainer apparently, as it sets off a sensor.
I've noticed what I think is a bug, when in car chases where you have to shoot at enemy vehicles, the game sometimes stops letting me move my target reticle and I end up having to go back into the car and come back out.