Why does the Moffat Tunnel have doors?

The tunnel utilizes a system whereby canvas doors are kept closed to keep fresh air circulated throughout the bore. These doors are connected to a circuit which is connected to the track and once a train trips this circuit (roughly 8 seconds before it reaches the east or west portal) the door will open.



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If for no other reason, the horn can alert those folks to get to safety. either to alert people when they enter the tunnel(like MOW, or trespassers) or in some cases, to be friendly at kids(or railfans) at the tunnel entrance.

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The horn alerts people that a train is approaching a railroad crossing. It can also be used to warn animals or trespassers in our right-of-way along a section of track.

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The Laerdal Tunnel in western Norway is the longest road tunnel in the world. It takes about 20 minutes to pass through the tunnel. Brightly colored lights placed every six kilometers help drivers stay alert.

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Connect the UK to continental Europe with an undersea tunnel The Channel Tunnel opened in May 1994 after 6 years of construction. It's the longest undersea tunnel in the world. The Channel Tunnel is really 3 tunnels, running parallel to each other. Trains go through 2 larger tunnels.

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