Hi all. The problem is: Neither Brouter or the Locus internal router (LoRouter) can work with osm tagging that has arbitrary value. Both routers only see a large SET of known values. This set is possible to extend, but it is still a limited set. For example in access=private, access=permit the values are "private", "permit". These are known values, of course. In maxheight=3.75, "3.75" is not a known value. For this reason, routing aware of tunnel heights e.t.c is not likely to happen soon, unfortunately. Radim, backend dev.