Subaru's EyeSight system does the same (after 3 secs the cruise goes into standby, but a tap of the gas or a flick of the "resume" switch gets the car going again). Having driven my Outback since 2015, I assumed *all* adaptive cruise control systems did this, but for some dumb reason, Toyota only offers this on 3 of it's cars (Camry, Prius, and C-HR) - SO DUMB! Not available on the Highlander, or their top sedan, the Avalon! I can't speak to other brands, but one of the requirements (so far as I know) is that the car must have an electronic parking brake (EPB) to hold the car at a stop in stop and go traffic (for instance, in the Subaru Impreza, which doesn't have an EPB, will bring the car to 0 mph, but after a few seconds, you have to put your foot on the brake - same with Forester).