Really nice! They appear to use a forked version of Graphhopper [1] [2] for route calculation. [1] https://www.graphhopper.com/ https://www.graphhopper.com/ [

Really nice! They appear to use a forked version of Graphhopper [1] [2] for route calculation. [1] https://www.graphhopper.com/ https://www.graphhopper.com/ [2] https://graphhopper.com/maps https://graphhopper.com/maps