Driving home from Chicago to Eastman WI I had a warning message appear "do you want to rest?". A coffee cup icon appeared with this message. This was the first time I have ever seen this message. So what trip this message to appear? 2017 Prius 23,000 miles.
If you have lane assist on, and it warns you more than a given number of times in a set period (i.e. consistently not staying in your lane or changing without indicating), or displays that.
I’ve had it come up a couple times. One time I can remember was when I was really upset and evidently driving more erratic then I normally do, and it came on in several miles. The car is quite perceptive if I have my hands on the steering wheel as well as keeping it in my lane or making lots of exaggerated corrections with the wheel. I do believe the coffee cup warning can be turned off. But, I see it as a safety feature and it rarely has come on for me
LKA (lane keep assist) warning. Slow down and follow the lines on the pavement. Or tap the LKA button on the steering wheel to turn it off.
If you have LDA turned on and are making lots of sudden corrections to stay in your lane or the LDA is activating to try to keep you in your lane, it suggests a break. The only time it ever happened to me is in 50 mph crosswinds on the interstate. Page 657 in the 2017 Prime manual. Probably a different page in yours. On page 194, it mentions that this symbol is displayed along with a message.
Close to home, my highway is rather curvy. LKA doesn't like curvy roads. The coffee cup is a reminder for me to turn LKA off. Additionally, you can disable the coffee cup warning in settings.
