The vehicle keeps displaying a dashboard notification indicating ‘Road departure mitigation system problem. See your dealer. The vehicle was most recently brought back from the dealer and after about 100 miles the car displayed this message again. The dealer continues to maintain there are no codes found and issue is not duplicated. The vehicle on two occasions has tried to depart the lane on the highway with well marked lanes. I have ask numerous times for more information about attempts to duplicate and what codes should be displayed. This message has shown up around 20 times at this point. This is very concerning and poses a serious safety concern. Photos are from two instances. This message only comes up for a few seconds. The computer is failing to record this and I am being told there is noting that can be done since it cannot be duplicated. I have the photos and have experiences attempts by the vehicle to leave the lane. This is a hazard that could lead to injury or path of an vehicle occupants or general public. Please assist before injury or death occurs. There maybe an effort by both Honda and the dealership to conceal this issue as I do not believe that is not being duplicated even if there are no codes. There being no codes registered is in itself a sign that there is a problem with the computer as there is photographic evidence.