Assen to Groningen Doorfietsroute (fietssnelweg, cycling superhighway) August 2019 

Not all Dutch cycle-paths are red. Many cycle-paths are made of asphalt and with this it is relatively easy to achieve a red colour (though far from every asphalt cycle-path is red). But this cycle-path is made of concrete. Concrete is much more stable (we have 30 year old cycle-paths which have received minimal maintenance but still are of excellent quality). It is rare for concrete to be coloured. There is more information about concrete cycle-paths here: www.aviewfromthecyclepath.com/search/label/concrete