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Post by trt on Sept 13, 2013 8:52:39 GMT
Hi,
I've noticed a number of yellow boxes with twin flashing orange lights appearing along the line. The one at Euston has been out of action for a couple of weeks. They straddle one of the TBTC cables, but I can't see any obvious electrical connection. The Euston one was back working again this morning.
What are they for, please?
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Post by londonstuff on Sept 13, 2013 9:58:35 GMT
Hi, I've noticed a number of yellow boxes with twin flashing orange lights appearing along the line. The one at Euston has been out of action for a couple of weeks. They straddle one of the TBTC cables, but I can't see any obvious electrical connection. The Euston one was back working again this morning. What are they for, please? I believe that they are a visual indicator to drivers to tell them that there is, e.g. a temporary speed restriction in place and as a warning to look out for the speed limit sign. Whether these will be needed once that section goes TBTC (within the next week or two, I believe), others will have to say. |
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Post by trt on Sept 13, 2013 10:39:04 GMT
It is right in front of a sloping blue 25 sign between the rails. To be honest, with all the dirt and crud in the tunnels, the sign is now no longer readable.
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Deleted
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Post by Deleted on Sept 13, 2013 16:25:17 GMT
yep that's a temporary speed restriction, 25mph, further up the track will be another set of flashing yellows with a sign showing TT after it for the termination of the restriction  |
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Deleted
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Post by Deleted on Sept 13, 2013 16:26:25 GMT
Hi, I've noticed a number of yellow boxes with twin flashing orange lights appearing along the line. The one at Euston has been out of action for a couple of weeks. They straddle one of the TBTC cables, but I can't see any obvious electrical connection. The Euston one was back working again this morning. What are they for, please? I believe that they are a visual indicator to drivers to tell them that there is, e.g. a temporary speed restriction in place and as a warning to look out for the speed limit sign. Whether these will be needed once that section goes TBTC (within the next week or two, I believe), others will have to say. I'm not 100% sure but i imagine they will still use temp speed restrictions like that and get the drivers to drive the section in protected manual where a TSR has become necessary. |
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Deleted
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Post by Deleted on Sept 13, 2013 18:02:23 GMT
When TBTC is introduced, TSRs are applied on the system and automatically appear on the train op's display in PM. Only if the TSR is less than 16kph does it need to be on trackside signage (for trains running in restricted manual).
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Post by trt on Sept 14, 2013 13:52:59 GMT
The light boxes are battery powered, then?
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DWS
every second count's
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Post by DWS on Sept 14, 2013 15:16:43 GMT
Yes
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Post by trt on Sept 16, 2013 10:51:04 GMT
That explains why they run down, then! |
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