From OpenStreetMap Wiki
|Indicates that there is a device that lets the floor vibrate at walk signal.|
|Used on these elements|
|Status: in use|
|Tools for this tag|
traffic_signals:floor_vibration=yes/no is used with crossing=traffic_signals to indicate that there is a device that lets the floor vibrate at walk signal. This is often used near homes for the deaf-blind.
A renderer is Look and Listen Map