Mizter T wrote:

A bus swerving to avoid a car would appear to be the genesis of the
accident. ... *if* (and that is a big if) the traffic signals had in
some way malfunctioned then things would become more interesting
given the interface between highway and tramway signalling.

I don't follow your reasoning. If the genesis of the accident is a bus
swerving to miss a car, then I can't see that the tram's signalling is
in any way implicated.


--
http://gallery120232.fotopic.net/p9632956.html
(43 084 at Basingstoke, May 1995)

Chris Tolley wrote:
Mizter T wrote:

A bus swerving to avoid a car would appear to be the genesis of the
accident. ... *if* (and that is a big if) the traffic signals had in
some way malfunctioned then things would become more interesting
given the interface between highway and tramway signalling.

I don't follow your reasoning. If the genesis of the accident is a bus
swerving to miss a car, then I can't see that the tram's signalling is
in any way implicated.

Presumably the road and tram signals are interlinked in some way, to
avoid a tram being sent into the path of cars, or vice versa.

--
Arthur Figgis Surrey, UK

Arthur Figgis writes:

Presumably the road and tram signals are interlinked in some way, to
avoid a tram being sent into the path of cars, or vice versa.

On the other hand, where a tram is running along a road, is there any
need for it to have separate signals? Would it not suffice for it to
have to obey the same red/amber/green traffic lights as other traffic?

Graham Murray wrote:

Arthur Figgis writes:

Presumably the road and tram signals are interlinked in some way, to
avoid a tram being sent into the path of cars, or vice versa.

On the other hand, where a tram is running along a road, is there any
need for it to have separate signals? Would it not suffice for it to
have to obey the same red/amber/green traffic lights as other traffic?

One can imagine good reasons for there being a separate signal for the
tram, including the phasing of tram signals being different and,
especially in situations where there are multiple lanes of traffic, the
need to give a signal that applies to the tram but not to traffic.

--
http://gallery120232.fotopic.net/p9632899.html
(33 119 at Eastleigh, 15 May 1985)

On 8 Sep, 06:26, Graham Murray wrote:
On the other hand, where a tram is running along a road, is there any
need for it to have separate signals? Would it not suffice for it to
have to obey the same red/amber/green traffic lights as other traffic?

Croydon Tramlink doesn't have a signalling system. It's fairer to say
that the traffic light system includes lights targeted at tram
drivers.

U

On Sep 8, 7:43*am, Mr Thant
wrote:
On 8 Sep, 06:26, Graham Murray wrote:

On the other hand, where a tram is running along a road, is there any
need for it to have separate signals? Would it not suffice for it to
have to obey the same red/amber/green traffic lights as other traffic?

Croydon Tramlink doesn't have a signalling system. It's fairer to say
that the traffic light system includes lights targeted at tram
drivers.

As it might have for different lanes of traffic in any case,
presumably, given that trams have their own lanes.

"Mr Thant" wrote in message
...
On 8 Sep, 06:26, Graham Murray wrote:
On the other hand, where a tram is running along a road, is there any
need for it to have separate signals? Would it not suffice for it to
have to obey the same red/amber/green traffic lights as other traffic?

Croydon Tramlink doesn't have a signalling system. It's fairer to say
that the traffic light system includes lights targeted at tram
drivers.

U
Surely the white lights which show horizontal (stop), vertical (go) and
diagonal (junction) count as signals? The drivers certainly treat them like
signals!

MaxB

"Batman55" wrote

Surely the white lights which show horizontal (stop), vertical (go) and
diagonal (junction) count as signals? The drivers certainly treat them
like
signals!

Indeed they are. Tram drivers are not required to observe road
(red/amber/green) traffic lights, but there will be a white dot signal head
at the same location. These are also to be found at junctions, level
crossings, and at the section of interlaced track. Elsewhere the trams are
driven on sight.

Peter

On 8 Sep, 16:35, "Batman55" wrote:
Surely the white lights which show horizontal (stop), vertical (go) and
diagonal (junction) count as signals? The drivers certainly treat them like
signals!

I didn't say it didn't have signals, I said it didn't have a
signalling system. I'm assuming the lights at junctions are
freestanding installations of minimal complexity, and the tram lights
at road junctions are just traffic lights with unusual heads. There's
nothing more elaborate than that, as far as I know.

U

On Mon, 8 Sep 2008 12:11:07 +0100, Mr Thant wrote
On 8 Sep, 16:35, "Batman55" wrote:
Surely the white lights which show horizontal (stop), vertical (go) and
diagonal (junction) count as signals? The drivers certainly treat them like
signals!

I didn't say it didn't have signals, I said it didn't have a
signalling system. I'm assuming the lights at junctions are
freestanding installations of minimal complexity, and the tram lights
at road junctions are just traffic lights with unusual heads. There's
nothing more elaborate than that, as far as I know.

That's still a signalling system. A 'system' isn't *always* about technology
don't y'know