Yes but they'd probably have a public enquiry then a government one to see the environmental affect of trams on Drakeford's country garden country and then reject it. They can then set up a commission with a huge budget to look at alternatives.
I agree with what you say about Wellfield road, and while they're at it the should close Merthyr road in Whitchurch, traffic is killing the local area. And they could close Cowbridge Road east past the shops in Canton and send everything down Wellington Street, close Severn Grove and Conway Road and close Pontcanna street too, that is used by far to many people and is very close to Mr Drakeford's house!!