What is the distance between two verge markers on a straight country road?

On country roads, the distance between verge markers is 50 metres. On motorways, the distance is 100 metres. In some curves, however, the distance between markers is only 25 metres.

Verge markers mark out the road's edges to make it easier for drivers to see and follow the road. All verge markers are equipped with reflectors. The reflectors are normally white, but before and after junctions, bus stops and other exits the reflectors are orange .