Signage and difficulties for a safe bicycle holiday
Blue route - easy Family-friendly cycling route that can be used with normal bicycles as well with good paving (fine gravel or asphalt and comparable covers). Rises and drops between 0% and 5%, on short routes up to 10%. Alternates between rises and drops, no continuous climbs. Paths without or only little car traffic. There are no special danger areas or danger points are indicated by special marking (e.g. signs).
Red route - medium Requires athletic cycling skills and particularly defensive cycling behaviour. Mountain bike equipment is recommended. Rises and drops between 5% and 12%, with short sections of up to 17% at most. There are difficult to oversee, curvy route sections. Car traffic requiring the entire width of the path must be expected. The track equipment, among others the pavement properties, drainage facilities (e.g. water spools), barrier devices (e.g. barrier booms), safety devices (e.g. missing railings and fences) and notes indicating danger points are only designed for industrial traffic with tractors and trucks. Such spots may be danger points for cyclists on their own.
Black route - difficult Difficult, demanding mountain bike route with many dangerous sections that exceeds the maximum climbs of the red routes and are even more difficult in their setup. Mountain bike equipment is mandatory. Foresighted cycling adjusted to the situation is required.