I've tried and it seems like that the New York City is causing this. Which version of New York City are you running? This problem had occurred on my old PC as well. The original was causing a similar error, v1.1 was hanging a lot, and v1.2 was just fine. I downloaded v1.2, it was only perfectly fin...

I've tried and it seems like that the New York City is causing this.

Too much vehicle or track addons can cause this
try deleting some mods, tracks or vehicles

I don't have much addons, in fact, the ones I stated are the only ones I've downloaded.

I've downloaded the New York City track, 2009 Dodge Viper SRT-10 ACR, Savegame 100%, Crazy Taxi, and El Toro Loco all from here.

Later on, I played the game, but it crashed at the vehicle screen for some reason, the error message said:

memMemoryAllocator;;FindHeap failed on ptr 29394ao

Just wondering, how do you add blitz/circuit/checkpoint races in a track?