Thanks for the photo. I couldn't explain what this was doing here (a cycle barrier at the bottom of stairs that you can easily go around?!?), so I consulted with OSMUS's #tagging channel (https://osmus.slack.com/archives/C2VJAJCS0/p1750055082371929)

Basically conclusion is that this isn't for bicycles, it's actually to discourage skateboarding down the stairs' handrail. I couldn't find a good tag for this, so I just went with a generic `traffic_calming=yes`.

I'm closing this note for now, but please reopen if you have anything to add.