I appreciate your insight chips123. Yes, I am still studying CCP and have found a few examples on the net. It is a puzzling project, more than I thought at first, because a "real" cruise control system does things like: slowing down before cresting a hill, so as not to overspeed, also it "smooths" out acceleration and if possible finds a spot that it locks at on straight roads. I am still trying to figure out whether I need to use just one CCP module or do I need two of them. Anyhow any chance of your showing some code of your experiments? Thanks