Looks like there's been an OTA software update of some sort in the last couple of days. I noticed the behaviour of my ACC changed, and it started responding to the detected speed limits. Luckily, there's an option to turn that off (go into the Driver Assitance menu, go to ACC, and turn off Speed Limit Response) - the 'off' setting of which persists through a shutdown and restart. The main reason I pretty quickly turned off Travel Assist when I first got the car is that the speed limit data on the in-built mapping is so woefully bad, and so keen to override what the car is actually 'seeing' on roadside signage, that it's almost dangerous. Around my part of the UK, at least, the mapped speed limit data is dreadful - to the extent that, if Travel Assist had its way, there are locations where the car would think a limit had dropped from 60 to 40, or 50 to 30 (or even 20) and would slam the anchors on in response even though the actual limit was nowhere near what the map data thinks it is. Borderline dangerous, if someone's driving too close behind.