cruise control
From Longman Dictionary of Contemporary EnglishRelated topics: Motor vehiclescruise controlˈcruise conˌtrol noun [countable] TTCa piece of equipment in a car that makes it go at a steady speedExamples from the Corpuscruise control• Realising this would be laughed at, I set the cruise control, undid my seatbelt and climbed into the back.• I can set this cruise control to any speed I want and it drives without me having to touch the accelerator.