Area routing is definitely a topic of interest. It looks like it's still a topic of discussion too: https://github.com/graphhopper/graphhopper/issues/82 https:/

Area routing is definitely a topic of interest. It looks like it's still a topic of discussion too: https://github.com/graphhopper/graphhopper/issues/82 https://github.com/graphhopper/graphhopper/issues/82. Maybe it's something I can help with in the future. Good point RE the green index calculation. The very least I could do would be to upstream a reference implementation and documentation back to Openrouteservice. I will take care of that.