The Subaru one stays on until you come to a complete stop. Even then, it&#x27;s still &quot;on&quot; in a way, since it&#x27;ll hold the brakes, but you have to flick up on the cruise control switch to get the car to start moving again. It&#x27;ll also notify you if the car in front has started moving again and you haven&#x27;t done anything (with or without ACC on). It&#x27;s on my girlfriend&#x27;s car, so I don&#x27;t use it every day, but it has been nice the times I&#x27;ve driven it in traffic.