Not as good as that, Thomas. Many cars which have cruise control (Renaults and Mercs at least) have speed limiters, which are, effectively, cruise control in reverse.
With cruise control, you electronically set the slowest speed that you want the car to travel at. You can choose to go faster with the accelerator but, if you take your feet off the pedals (assuming it's an auto), the car will maintain the speed you have set unless you turn it off.
The speed limiter works the other way. I set it to, say, 50, and I can travel any speed that I want to up to 50 but, unless I turn it off, I can't go any faster.
It's funny how many people (usually in motor vehicle manufacturing departments) brag about their cars being fitted with cruise control but hardly any mention the limiters. I've used the cruise control on mine once in 14k miles, for about 5 seconds, yet the limiter is set about a quarter of the time I am driving. If it was imposed on me, though, I'd pay money to get it removed.