Hi, when you're adding `crossing:signals=no` have you actually surveyed these crossings and confirmed the absence of signals?

I would be very surprised if some of these (e.g., https://www.openstreetmap.org/node/49789172/history/6) are actually uncontrolled crossing. In general, I don't think it's safe to assume that something tagged as `crossing=marked` can be safely "upgraded" to `crossing=uncontrolled` with `crossing:signals` because it's quite likely the original mapper did not intended assert nonexistence of signals when tagging the crossing as marked.