The 15 speed sign indicates speed without stopping at points the diamond
shows all ok i think if flashing blue circle appears operations centre to
be called before proceeding i not sure as i don't have my rule book at home
On 9 Aug 2017 11:52 pm, "Robbie Smithzoqaeski@... [TramsDownUnder]" <
> Can someone explain the difference between the various types of tram point
> signals that have been proliferating in recent years?
> The oldest style seem to be the bar type, with a horizontal, angled, and
> vertical bar, which I assume indicate the lay of the points. They're at
> almost every junction but despite clearly indicating which way the route is
> set, the driver must still perform a compulsory stop before the points to
> double check, which strikes me as a bit unnecessary. I was under the
> impression that the horizontal aspect indicates that the points aren't in a
> defined state, which should be adequate for those situations when the
> points haven't functioned as desired by the driver. Eliminating this rule
> with some sort of positive route locking would speed up movements through
> busy junctions; to the best of my knowledge this rule doesn't exist in
> European (especially German) systems, but I might be wrong.
> St Vincent's Plaza has a different style that has an arrow indication and
> a diamond above that. How does this style differ from the bar type? I asked
> a driver and they said it was because the E-class are too long and foul the
> blades, preventing the compulsory stop that would otherwise be required.
> The newest sort are these double-bar signals, which don't appear to
> indicate points at all. So far I've only seen them at the Nicholson St ×
> Blyth St and Toorak Rd × Glenferrie Rd termini, and they appear to be
> interlocked with the points on the terminating roads.
> There's also a fourth type, which I haven't been able to get a photo of
> yet, that uses amber instead of white LEDs, and shows either a * < * or
> * | * indication. These are only in three locations that I'm aware of:
> outside the NGV where Route 1 branches off, at Domain where the 8 formerly
> branched off, and at St Vincent's Plaza coming from Victoria St. I assume
> this style gives a preliminary indication as to the lay of the points, but
> I don't know for sure.
> Why are there so many ways of communicating essentially the same