Tag 'ref = M3'

• 4: ref
• 3: surface
• 3: source
• 3: aeroway
• 1: railway:signal:combined:height
• 1: note
• 1: railway:signal:minor
• 1: railway:signal:short_route:form
• 1: railway:signal:traversable:type
• 1: railway:signal:short_route:height
• 1: railway:signal:minor:form
• 1: railway:signal:combined:form
• 1: operator
• 1: railway:signal:short_route:deactivated
• 1: railway:signal:combined:substitute_signal
• 1: railway:signal:combined
• 1: railway:signal:short_route
• 1: railway
• 1: railway:signal:traversable
• 1: railway:signal:combined:deactivated
• 1: railway:signal:combined:states
• 1: railway:signal:direction
• 1: railway:signal:position