City Circle Speed Restrictions

 
  javaricho Station Staff

I understand that there is a speed restriction of 40 km per hour currently in place on the City Circle. I was interested as to what were the key factors in setting this. If somebody could fill me in I would be grateful.

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  Aurora8 Assistant Commissioner

Location: Sydney
I understand that there is a speed restriction of 40 km per hour currently in place on the City Circle. I was interested as to what were the key factors in setting this. If somebody could fill me in I would be grateful.
"javaricho"

Speed restriction? Isn't that the normal speed through the City Circle?
  djf01 Chief Commissioner

I understand that there is a speed restriction of 40 km per hour currently in place on the City Circle. I was interested as to what were the key factors in setting this. If somebody could fill me in I would be grateful.
javaricho

Signal spacing and down gradients.
  br30453 Chief Train Controller

Signal spacing and down gradients.
djf01

Which as well as train braking rates are the main factors used in determining the allowable speed in highly traffic areas such as the City Circle.
  wally-wowser1 Train Controller

Location: overlooking the Mt vic washaway on Soldiers Pinch
Maybe you should as about the un official record top speed   for the  Circle. No it wasn't  me but a guy? who is no longer employed by smeg rail with a nickname starting with "F "
.
wally
  javaricho Station Staff

Maybe you should as about the un official record top speed for the Circle. No it wasn't me but a guy? who is no longer employed by smeg rail with a nickname starting with "F "
.
wally
wally-wowser1

So what was the "unofficial" record?
  FullSeries Assistant Commissioner

Location: Sydney, NSW
Maybe you should as about the un official record top speed for the Circle. No it wasn't me but a guy? who is no longer employed by smeg rail with a nickname starting with "F "
.
wally
wally-wowser1

With a first name starting with K?

The circle has always been 40, with the portals being 30 due to the closeness of concrete pylons holding up the structure above it.
  wally-wowser1 Train Controller

Location: overlooking the Mt vic washaway on Soldiers Pinch
Full series  , yes    first name started with "K ".  Not sure if it was done with a revenue  or empty service . Knowing of the various other rumors about  him I wouldn't be surprised .


 Wally.
  Roadmaster Locomotive Driver

With a first name starting with K?

The circle has always been 40, with the portals being 30 due to the closeness of concrete pylons holding up the structure above it.
FullSeries

When you say 'always', how far back are you going? I recall that 60 was the speed limit, except for Circular Quay - St James where it was 80? In the 1970s. City Circle times used to be around 12 minutes, aren't they closer to 18 minutes these days?

The 30 at Goulburn St was, in my recollection, introduced after Granville, when extra supports were added to the base of the columns.

I am happy to be proved wrong on all of the above, but I distinctly recall trains travelling at much higher speeds than 40 when I travelled around the Circle in the 1970s.
  Groover Train Controller

Location: A long way from home
I believe you are correct.  The current speed restrictions at the tunnel entrances at Central were introduced after Granville.  I can remember coming down into Wynyard off the bridge in the am peak in the 70's at what seemed like a lot more than 40km/h (single deck rollingstock).  I also had some fast rides from Central into Town Hall.  Do the current city circle speed limits relate to the wheel squealing?  I know I appreciate the a/c rollingstock for muffling that noise.
  waxyzebu Locomotive Driver

I can remember coming down into Wynyard off the bridge in the am peak in the 70's at what seemed like a lot more than 40km/h (single deck rollingstock).
Groover

The single deck suburbans used to fly past Argyle Street at up to 50 mph on the descent to Wynyard.

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