Have to admit, this is a really useful feature. Our EcoDiesel Grand Cherokee has it and last night we had to traverse congested LA freeways - often stop and go for ~40 miles. Using ACC was a lifesaver. The GC lets you stop for a couple of seconds and it will automatically resume. If the stop is longer than a couple of seconds, you just touch the resume button and ACC is back on. But the logic also avoids the complete stops. It will slow and inch along rather than stop so the times that you need to use the resume button are really mitigated. Anyway, ACC for this kind of traffic is one of my favorite uses of it..... so I completely get the question.