On 10.06.16 9:37, Roland Perry wrote:
In message , at 08:28:20 on Fri, 10 Jun
2016, d remarked:
Have they simply not got around to removing them or do they still play
a role
occasionally? Perhaps to let the station staff know when a train can
leave?
Maybe for engineering trains?
I've wondered about this myself, esepcially as neither the Northern nor
Jibilee have wayside signals, save for gap indicators.
IMHO, they simply installed on the Victoria Line a newer and updated
version of the previous system. This mainly starters at stations.
There are, of course, a couple of differences: The code aspect on the
starters is now blue, rather than lunar white.
Also, the upgrade saw a modification to Victoria Line platform repeaters
in that they now simply show when a train can depart, rather than what
the starter's aspect is.
Perhaps somebody on the Victoria had the foresight to recognise the
platform repeaters for their aesthetics and thus request modification,
rather than deactivation and replacement with RTDIs?
One thing that I don't understand, however, is why they replaced the
waysides with other waysides with three lenses. Could they simply not
have used one lense with LEDs, the way they do on NR?