They define cities but does this bet apply to all highways in the US? I ask because at least one third of the year the lines on the highways are under snow and

They define cities but does this bet apply to all highways in the US? I ask because at least one third of the year the lines on the highways are under snow and dirt. Sometimes ice. DoT do not consider this to be emergency conditions. There aren't enough signs to guess where the road is. There are no reflectors as the plows would remove them. The power lines are all buried. Will all the states be injecting flush or below-surface RFID sensors into all the roads by 2030 every so many feet?