Trams, signalling and working

[Bayum]

So I'm on the Metrolink and I see the signalling row of lights and the like, but a few times we've been bumper to bumper to a tram in front. I take it trans work via line of sight? Why the use of signalling if the latter is true? I understand the need when working in towns and running on road, but not anywhere else!

 

[CatfordCat]

So I'm on the Metrolink and I see the signalling row of lights and the like, but a few times we've been bumper to bumper to a tram in front. I take it trans work via line of sight? Why the use of signalling if the latter is true? I understand the need when working in towns and running on road, but not anywhere else!

This page from LRTA has more.

Broadly, tram systems are worked on 'line of sight' although Metrolink has railway style block working on some of the former railway lines.

The signals in (for example) Manchester City Centre are more the equivalent of traffic light phase signals for trams than block signals, and / or indicate which direction the points are set in.

 

[spinba11]

The only time tram lines need the block system is when running 2 ways on a single track.

 

[snowball]

The Bury and Altrincham lines had block signalling but it is being phased out and the whole system will be line of sight. The approach to Altrincham will be the last section to be converted because of the complicating factor of the level crosssings shared with Network Rail.

Signals will continue to be needed where lines divide, merge or cross each other and at many places where they join or cross roads.