Hi Felix,
Some remarks about the merge lines concept, and the reasoning why it
will not help much and needs to be extended/changed.
Your remarks are most interesting. I have been considering writing some
code to tweak the arc headings to help make the routing directions more
sensible. In my head, I have already thought how and where to do that.
I would be happy to incorporate your ideas into the experimental code
so we can evaluate them.
Go for it, this would really make mkgmap awesome (it's already great).
I'm happy to bugtrack as usual :)