text: I tried it with motor_vehicle=emergency + maxspeed:motor_vehicle = 10. Usually it can be mapped with highway=service + service=emergency_access, but in this case it's clearly a foot-/cycleway that can be used/has to be signed for emergency cases. I don't think that maxspeed is valid for bicycles as well (it's not signed on the other sides of the way). An image of this situation can be seen here: https://www.mapillary.com/map/im/7CYBd6hHKe3xT4nxpvVPGw