Tag 'ref = N501'

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