I don't mind if you change it to private.  I marked it as permissive because... even though it's private land... it's NOT gated and it's publicly accessible right-of-way (so much so that even Google Street View photographed the entirety of that road... something they don't do on fully private roads).  This is so that people can get to the marshland trails east of the RR tracks.  But, again, thank you for checking with me -- an argument can be made for marking it private too, so I'm certainly okay with that.