Cruise Control

With computers in cars today, why not have a way to preset 3 speeds and be able to change your cruise control speed by a press of a button. I drive cross country alot and you have your cruising speed, then you have to small town slow down speed, and finally your city limits speed.

Tredmills have had this technology for years. I would like to be able to set my speeds and just press a button and my car slow down or speed up to the new speed limit.