Re: SLR pictures for December

["Ted Gay" <tedgay@bigpond.com>]

<jshugg@westpac.com.au> wrote in message 93brn1$mc$1@nnrp1.deja.com">news:93brn1$mc$1@nnrp1.deja.com...
> In article <F8666.2238$mO2.8307@newsfeeds.bigpond.com>,
>   "Ted Gay" <tedgay@bigpond.com> wrote:
>
>
> > Yes!  all speed limits are monitored by the ATP (Automatic Tram/Train
> tram
> > will reach that speed but the brakes must then be immediatley applied
> for
> > the exit.  It is much better to accelerate to the high 60s and coast
> before
> > appling the brakes for the exit, there are stops at both exits. The
> speed
> > limit through all stops and walkways is only 20km/h.  If you stand at
> the
> > cab door you can watch the ATP screen and the changing speed limits
> and the
> > additional information given by this system, i.e. distance to next
> change of
> > speed limit and the limit.  If the driver has not turned down the
> volume you
> > will hear the system beeps, first beep = coast, second beep = brake,
> i.e.
> > the driver is to apply the brakes, however if he/she doesn't the ATP
> will
> > apply the emergency brakes complete with track brake application.
> >
> > Ted
> >
> Gosh, sounds very smart! I remember in Melbourne when the Port and
> South Melbourne lines were converted to light rail (allowing the trams
> to travel quickly free of other road traffic), it wasn't long before
> there was a nasty rear-end collision between two trams.  I presume your
> ATP system on the SLR would prevent that sort of thing happening.
>
>
> Sent via Deja.com
> http://www.deja.com/

Yes the ATP together with the signalling should prevent rear-ends.  Note the
signals in Matthews shots.  On the signal, two whites = ALL CLEAR, indicates
no tram in the section ahead usually to the next stop.  One red with one
white, DRIVE ON SIGHT, usually means there is a tram in the section ahead,
the local rule is wait one minute then radio the controller, who may or may
not give permission to pass, if allowed to proceed the ATP will set a lower
than normal speed limit for the section.  One red light is the stop signal,
i.e. do not pass, the ATP will apply the brakes if the driver attempts to
pass this signal.

Before each signal are two yellow plates in the four-foot, the balizes.  The
balizes send to the onboard ATP a 'telegram message' giving information such
as the signal indication.

Hope this brief explaination helps you.

Ted