Keepright shows lots of missing bridges in northern NH. Three questions from a user new to armchair mapping:
- Is it safe to insert bridges in interstates and US highways? They involve relations, about which I know nothing, and I believe that “If you do not know what you are doing, don’t do it!!”.
- The NH-VT state line runs right down the middle of the Connecticut River, so the highway changes name and ownership right in the middle of the river. What is the correct way of making bridges which cross a state line?
- Finally, is there any genuine value in adding bridges? I am sure that routing software will happily route you over an unbridged river!