My 2016 Ram has a setting in the radios Menu
When i have my Navigation showing on the radios screen
in one of the corners it shows the speed limit, some times the road sign has changed & the radio is incorrect.
I forget if the warning is displayed on the screen.
I believe i have my warning set at 7 miles higher than the speed limit.
If you get a ticket for 10 miles over the speed limit, it is considered Reckless Driving
When that happens, give the officer a polite smile & keep your hands on the top of the steering wheel.
If you live out of State & the Officer is wearing this type of hat, smile real nice & hope that he has had a very good day