V/Line Customer SMSs

  xxxxlbear Token Booking Clerk

Location: Geelong
This morning, I received an SMS from V/Line kindly informing me of today's heat related speed restrictions. A copy of which is:
'Hot weather speed restrictions apply today Footscray - Manor Junction, 12:00-20:00. Allow extra travel time. More info: vline.com.au/heat'.

The point of interest is, how would anyone, apart from a railfan, know where Manor Junction is? This is probably the 1st time that I am aware of that the locale has been used when dealing with the public ☺

Oh, and if it is in reference to the line via Sunshine and Tarneit (rather than via Werribee) then its a bit of a concern as it is the RRL that we are talking about, as it is a brand new line.

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  damooops Junior Train Controller

Location: The Revenue Raising State
G'day all.
Manor Junction is the point at which the new RRL tracks come off the new flyover and join up with the existing Geelong line near Werribee. Also heat restrictions apply when the temp. reaches 36 degrees C and on some freight lines this means no trains. It is temperature reliant on whether heat speed restrictions will apply, not if they have concrete sleepers or wooden ones.
Cheers all.
  bevans Site Admin

Location: Melbourne, Australia
Not withstanding the SMS why are V/Line issuing speed restrictions on new track with concrete sleepers?
  randomnarwhal Locomotive Driver

Not withstanding the SMS why are V/Line issuing speed restrictions on new track with concrete sleepers?
To give more of a chance of stopping if the track buckles?
  Lad_Porter Chief Commissioner

Location: Yarra Glen
There was an interesting thread in here a couple of years ago, on the subject of concrete sleepered track and rail buckling in the heat.  One comment made then by Woodford says "concrete sleepered track works differently to timber sleepered track. In the latter track the spikes are designed to allow the rail to slip, allowing the expansion to be taken up by the expansion joints. With Concrete sleepered track the clips hold the rail tightly so it cannot slip. The sleepers are also quite heavy and most important of all the tension in the rail is very closely controlled so as the track changes in temp from around -6 degrees c to say +50 degrees, the tension/compression in the rail never exceeds the point where damage would occur. Thus the expansion/contraction is spread through the entire length of the track so buckling cannot occur."

That thread also refers to a couple of videos called "Rails that grow", made by the NSW Railways as training videos.  Unfortunately these seem to be no longer available, but they contained an excellent explanation of the forces at work on a hot day, and of how these can be controlled.  Does anyone know if these videos can still be found?

Here's the link to the thread:  https://www.railpage.com.au/f-p1881755.htm

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