I read that the simplest process that works in using multiple vehicle profiles (car ,foot , hike) is to download an osm/pbf file from Geofabrik and modify the config properties, in order to produce a graph with CH off and the vehicles you wish. Then I can load the produced graph and play with it by using the proper vehicle.
The thing is that I couldn't understand how I can modify the config properties and where?
please any help
The config.properties files sits in the root of the repository (see dev guide) or at the relative location if you install GraphHopper via the zip file (see user guide)
Then you need to change the line with the flag_encoders to:
graph.flag_encoders=car,foot,hike