Lecture Friday: Programming Vehicles in Games
By vehicle he means car, but the idea that there's limits to how much you can simulate in realtime for a game is absolutely true. Love that he shares a great base model for a vehicle though. A fantastic resource for anyone starting on a car in games. You'll have to play around with the feel until you get something better for your game, but a good starting point to understand the basics none the less.
There's also a webpage version for quick reference.