Lincoln Navigation has incorrect speed limit detection/programming on rural roads in Fulton County Ohio. When using the Adaptive Cruise, firstly the Speed Limit icon that is stationary on the dash, right in front of the driver, has incorrect speed limits. The speed limits icon also randomly goes from the incorrect speed of 45mpg, suddenly for no environmental reason, drops to 25 mph, then after a distance, goes back up to 45 mpg. The speed limits on all rural roads, other than municipalities, is 55 mph. While using the Adaptive Cruise, if someone is behind me, doing 55 mph that I've set my cruise to, and SUDDENLY I drop my speed to 25 or even 45 mph, there could most likely be a rear end collision. I have been in contact with Lincoln dealerships, Lincoln Concierge, Lincoln Way, Lincoln Over the Air... I just get passed around from department to department, having me reset my screens, but no knows how to fix. I've spent numerous hours on the phone. No one calls me back like they say they will. I've repeated this issue so many times to so many different people and departments, it's been extremely frustrating. If they could get me to someone that programs the navigation that Lincoln follows to re-programs those incorrect roads, all would be fixed. I believe Lincoln has it's own system because Google Maps and Waze are displaying the correct speeds at the exact locations.
NHTSA ODI 11667220