[bliker]

I think red is generally used for long distance trails and other colours are used for auxiliary routes. Because of that, colour clashes are rare. Because all major intersections have arrows you just really need to remember your destination. Often you even have the information about public transport at the destination.

Example of a map: https://mapy.hiking.sk/?zoom=11&lat=6261583.4553&lon=2274012...

[cujo]

I guess I don't see how this is such a remarkable system. Everywhere I've hiked there has been some sort of blaze system to keep you on the trail you want. This looks pretty much identical, only with the added bonus of ambiguity throughout the country.

I just don't see the utility that makes this such a great idea.

[dejv]

Ambiguity is the key here. The system is set in a way that no matter where you are there are lines going just anywhere and once you are into it you will never miss any interesting spot. Also all the lines connect to each other, so I can start walking in one place and circle whole country.

Bonus point: whole system depends on volunteers who keep markings on all lines.