This article has a picture with a tram and a map that shows 'light rail' on it. Someone who oversaw the Nottingham tramway is mentioned as being involved here. Good article to read.
http://www.itv.com/news/wales/update/2013-10-09/plans-show-the-potential-of-metro-network/
ITV news reported this last year. It shows a map that lists some routes as 'bus rapid transit / light rail'.
The map appears to show Barry, Penarth and Cardiff Airport as becoming tramways.
If the Valley Lines to Penarth & Barry became 'tramways', then presumably valley line train drivers would be relegated to tram drivers with an appropriate drop in pay.
This whole idea of having trams working on the 'normal' rail system across south east Wales seems to be totally ridiculous - not least because of the distances involved between the heads of the Valleys & the coast.
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That is a plan that's being looked into..........crossing Callaghan Sq.
Callaghan Square & the top of Bute Street are currently very congested - mainly because of all the traffic heading for the St.David's 2 and John Lewis car parks. (Locals from the west are ignoring the Westgate Street car park due to high prices allied with lack of access/ergress when events take place at the Millennium Stadium. They therefore add to the congestion at Callaghan Square). At least with the present Queen Street to Bay rail line, Valley Line passengers can reach the Bay without getting delayed by this congestion.
It seems to me that the Cardiff Bay Development Corporation made a big mistake in ramming office blocks right up against the railway on the northern side of Callaghan Square. Surely, it would have been better to have inserted a new elevated rail line in this position to cross over the road junctions and then follow the present line to the Bay and thus provide a direct link from Central to the Bay avoiding roads. (The rail link from the Bay to Queen Street could then have been closed). It just shows that the so called experts can get things so wrong.
So, if we now have a tram running at street level from Central to the Bay, it could well be prone to getting stuck in all this congestion. Then we have the 'problem' of the bus/coach station. Some have suggested that it should go to the south side of the Central Station. (I will start a new thread on this).
Anyway, I have seen a new plan for Callaghan Square which actually removes the road from the north side and places all traffic on the south side. This plan does not appear to show any provision for a tram system. You can see the plan in this link (second image) which shows Callaghan Square as viewed from the NE.
http://cardiffwalesmap.com/OurForum/viewtopic.php?f=1&t=46