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Preserved Railway Signal Boxes and Signalling Regulations

Signalling on heritage railways

Re: Preserved Railway Signal Boxes and Signalling Regulation

Unread postby Richard Lemon » Fri Aug 12, 2016 6:04 pm

Correct John. Snowdon is Radio block with all instructions (given by the Traffic Controller) recorded by the Guard on the Block Ticket.

In the first three sections - Llanberis - Hebron; Hebron - Halfway; and Halfway - Clogwyn second train may follow the first "on sight" after a two minute interval. In the top section (Clogwyn - Summit) there is space segregation so a second train may only enter the section after the first has passed a set position.

Richard
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Re: Preserved Railway Signal Boxes and Signalling Regulation

Unread postby Mike Hodgson » Fri Aug 12, 2016 8:07 pm

Richard Lemon wrote:In the first three sections - Llanberis - Hebron; Hebron - Halfway; and Halfway - Clogwyn second train may follow the first "on sight" after a two minute interval. In the top section (Clogwyn - Summit) there is space segregation so a second train may only enter the section after the first has passed a set position.

Richard

Why does the top section warrant different criteria - visibility issues in low cloud ?
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Re: Preserved Railway Signal Boxes and Signalling Regulation

Unread postby Richard Lemon » Sat Aug 13, 2016 6:57 am

Mike

Yes!

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Re: Preserved Railway Signal Boxes and Signalling Regulation

Unread postby JRB » Sat Aug 13, 2016 8:12 am

And restricted views on some curves I think.
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Re: Preserved Railway Signal Boxes and Signalling Regulation

Unread postby Richard Lemon » Sat Aug 13, 2016 1:51 pm

Indeed. - let us just say potential restricted visibility.
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