Hier kriegen Routing-Algorithmen es nicht hin, Routen einfach geradeaus am Kanal entlang zuzulassen.

https://www.openstreetmap.org/directions?engine=fossgis_osrm_bicycle&route=49.546102%2C10.969242%3B49.545938%2C10.969242#map=17/49.543336/10.965160