It seems to me that the intent is pretty clear that this shouldn't be used. But the gates/barriers are vandalized and the East sign is missing (it used to be there). Personally, I wouldn't retag this as open.

It's very similar to this - https://www.mapillary.com/app/?pKey=975696783696661&focus=photo - sure, people use it all the time, but it's not technically legal and if they get hurt or the bridge collapses - it will be their own fault.