BRouter: following long distance cycle routes
The long distance cycle network ( see www.opencyclemap.org )
is the first thing to consider when planning a cycle trip.
BRouter can do that, and the "trekking" profile makes use of it.
It does that implicitly by just making them cheap in the cost-function,
so that the routing sometimes "snaps in" to long distance cycle routes.
That's a good choice for long distance cycling, because these routes are
a "safe harbor" almost free of bad surprises. However, when really looking
for the "optimal" route between A and B to use it more than once (e.g.
your daily commute) you may want to ignore the long-distance network,
to put more focus on "hard-facts" like distance, hills and surface quality
(use the "trekking-ignore-cr" profile for that purpose).