What is the best way of tagging a short way connecting the two sides of an Interstate like this? These are quite common in the OSM map of VT, much rarer in NH.
My real concern is not making keepright happy but preventing routing software from using those passages, marked (in NH) “Authorized Vehicles Only”.
I use access=emergency when tagging on the NYS Thruway. That way if anyone builds a map view that shows emergency access points it will show.
Access=private I use on things like park service ways and private access to commercial buildings.