Two routers I tried (OSRM, ORS) did not route on the highway=service line 178383235 https://www.openstreetmap.org/way/178383235 despite it is public. Do they avoid maxheight and maxweight highways? |
I suspect the routers don't want to route over the lift gate down the road which has no access tag allowing passage. Since your service road is oneway it would be a dead end and the routers could have excluded it from the routing graph. |
graphhopper does : https://www.openstreetmap.org/directions?engine=graphhopper_car&route=49.99805%2C8.25949%3B49.99859%2C8.25933#map=19/49.99832/8.25946