This is an interesting idea, its a parental control system for cars called MyKey. The idea is that parents will able to set limits such as adding a top speed that should not be exceeded and setting how the loud the stereo can go. Ford will introduce the controls on some US makes of car that will be go on sale in 2010. The Ford Focus will be the first car to include the MyKey system but it is likely to become a standard feature. The main feature of the system is that you can set the top speed of the car to 80mph. It also has other options such as setting a volume limit of the car stereo, making the car sound an alert if the passengers do not wear a seatbelt and setting warning tones if the car goes faster than 45, 55 or 65mph. The system is aimed at new drivers but I do wonder how many new drivers can afford a brand new car. The cars I had when I started driving struggled to go more than 80mph downhill with a following wind. In fact my current car would probably need a push.