Do you know why these signs are put up every 200 meters along the road? This is in case you need help, then you can explain to the Emergency Services exactly where you are.
The N3 is the highway you are driving on.
The -6 is a "section" of the road.
25.6 is the amount of kilometers you have traveled from the previous town.
N is the direction (north)....
Be safe this holiday season.