If you live near a fully de-certified crossing you should send a letter to the railroad (don't know where you are for that knowledge), and there are 2 others who i know would deal with that but the name is not coming to me. I think one would be NTSB. Usually there are wayside sinage that indicate crossing ahead and that is what indicated to the engineer to sound 'grade crossing'. The railway should eventually remove the signs and put road orders into effect until all engineers who 'know' that there is a crossing there are retrained.
Re: Came across by random search
good luck.