Cruise control has been around for decades, but how does it work? That depends on whether it's old-school cruise control or its modern, adaptive counterpart.

Anyone who’s pulled a trailer for hours on the interstate knows how tempting that little cruise control button can be. Give your foot a break, lock in a speed, and just roll. Simple, right? Not always ...

Drivers looking to improve their MPG might consider switching to cruise control. However, this will work best on flat roads with little traffic.