I am all for providing the best public transport system and see rail as the best way for shifting large numbers of people efficiently. Like the majority on this post, I was alarmed at the prospect of seeing the streets of Cardiff dug up for a tram system that would also operate over the present local rail network. As Gareth Marston has pointed out - everything in the centre of the city is within a 10 minute walk of a railway station. However, where I disagree with Gareth and others is on the situation regarding roads.
In the early 1990’s warnings were given that the M4 would be jammed at Newport due to the 2 lane each way tunnel at a very busy point on the M4. Rhodri Morgan came to power and threw out the previous Conservative Party proposals for a south of Newport new M4. He said that a lot of traffic was going to Cwmbran - hence the building of a new road above the eastern portal of the tunnel. Whilst that has proved useful, it has not addressed the main problem with the M4 around Newport. So, here we are, all these years later and we constantly have massive jams on this section of the M4. I fully support the Black Route for a south of Newport M4 and had Rhodri Morgan not cancelled it back in the 90’s, it would have been built for far less than the present price and today, we would probably have had a fresh load of money to spend on the so called Metro. I also realise that vast amounts of money have been poured into the Clydach gorge section the A465 west of Gilwern. The A465 has been notorious for accidents and I fully support the dualling of this highway. The M4 around Newport also has a high accident rate due to the high volume of traffic and its hilly and twisting nature. Failure to build a new M4 to the south is going to result in more deaths and the delays will impact the economy across the whole of southern Wales. Labour’s spending on highways has not been good. Witness the fact that they have still not built the Eastern Bay Link in SE Cardiff and when they built the recent 1 mile bit, they did not build a flyover to take through traffic coming out of the Butetown tunnel - as was originally intended.
I note that the Newport section of the M4 would be carrying east-west traffic. Whilst I am pleased to see the new Hitachi Inter City Express Trains enter service, I note that trains to be used on the Cardiff > Bristol > Bath > Salisbury > Southampton > Portsmouth route will see a downgrade from 158’s to old Thames Turbo commuter trains (165/6’s). Whilst these will offer more seats (jammed in as 5 across) and become 5 coach trains, they are hardly the wonderful trains that one would expect to link these major cities and induce traffic off the roads.
Likewise, Cross Country will no doubt continue to use inadequate 2 or 3 coach 170’s on the Cardiff > Newport > Gloucester > Birmingham > Nottingham route. These will be even more overcrowded (& slower) once the new Worcester Parkway station opens.( At one time, south Wales had direct Inter City Trains that continued to the north-east).
If the Welsh Government fail to give the go-ahead to the black route M4, it will be electoral suicide - even in Labour heartlands. You can monitor the traffic on the M4 at Newport by clicking this link:>
https://www.google.co.uk/maps/@51.5751314,-2.9345584,13z/data=!5m1!1e1