LNW-GW Joint
Veteran Member
At an approach speed of 80 mph or greater, if the turnout speed is 40 mph or higher then flashing yellows can be applied (if this can be acheived without confusing the driver). If the turnout speed is 35 or less then MAR (main aspect approach released from red) is required.
At an approach speed is between 40 and 75, if the turnout speed is 30 mph or higher then flashing yellows can be applied (if this can be acheived without confusing the driver). If the turnout speed is 25 or less then MAR (main aspect approach released from red) is required.
If the turnout speed is within 10mph of the approach speed or the approach speed is lower than 40mph then no controls are required.
The Down Helsby to P4 signal check will be because of a short overlap or awaiting the junction clearing ahead - the move Down Helsby to Down Main is only 10mph anyway, IIRC?
Thanks, I understand the rules now.
Actually I meant the Down Main to P4 at Warrington.
Chester trains normally run over to the Down Main at Acton Grange (50mph), then over the MSC bridge, then gradually slow to the approach control on the 100/90mph Down Main, and then when at walking pace speed up for the 50mph turnout for P4 when the red clears.
So you have a 175 clogging up the Down Main unnecessarily.
(Routeing via the Down Helsby is even slower with the 10mph crossover!).
A similar run routed into P3 is much faster, with no approach control needed.
I have a theory that the mysterious Northern Hub sub-project entitled "Chester-Warrington Journey Time Improvements" is in fact fitting flashing yellows at Warrington.
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Something for the rivet counters:
On a second run this week I counted 150+ concrete foundations installed between Huyton and Springs Branch on each line.
Some extend east of Bryn on the Up (eastbound) line, but not yet on the Down.
Can't be long before the first steelwork appears.
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