notes about name tagging on highways: originally the name tag of the highways are used for the name of the entire G15 route (沈海高速) and thus tunnel names have to be tagged with tunnel:name. However, it is unclear whether having two names on the same object is a good idea as that means the way represents both the highway route and also the tunnel. Perhaps the name of G15 should be tagged on the relation instead, and then individual segments of tunnel or bridge can be named based on their names.