Tag 'ref = 51 88'

• 1: railway:signal:combined:height
• 1: ref
• 1: railway:signal:combined:substitute_signal
• 1: railway:signal:combined
• 1: railway
• 1: railway:signal:combined:form
• 1: railway:signal:combined:states
• 1: railway:signal:direction
• 1: railway:signal:combined:function
• 1: railway:signal:position