I was there. Your server isn't crashing.
Your new track, Big hills (or what ever it was called) is a huge track! It took me almost 2 minutes, but it finally loaded the track, same with un loading. It took so long, I was actually in the start box with the light already green when I was finally able to move again.
The timeout means it shut down cause you lagged forever.
Take out your new track and it should all work again. (Even though I loved it)