There are nine different areas that can be improved, including Endurance (boosts your driver's healing rate), Focus (helps reduce damage to the car and driver during prangs) and Handling (pretty much self-explanatory that one). Your man behind the wheel also has the ability to intimidate the guy in front in classic white van man-style by driving right up his arse, causing weaker-willed opponents to lose control. This also affects you, unfortunately.