Project CARS is a fascinating...project. It's a racing game that, while helmed by professionals (the team behind Shift 2), is also being worked on by large teams of fans.
Reader FLX1981, for example, went and filmed a track he and a friend wanted in the game. After making the suggestion and handing off the data, it's actually going to be in the final product.
The last time we saw it, with development at around the 15-20% mark, the game was looking good, if a little creepy since it had no drivers.