May I ask if you have seen such an aspirational project in any forward planning documentation for the Manchester Metrolink in official papers from TfGM.
It is oft suggested to them but often slapped down as not "being inkeeping with the long term plan" or similar. Eventually they proposed this rather questionably useful bus priority scheme to shut people up.
Although it doesn't really deal with the core of the issue - current transport provision in the corridor is woefully inadequate and will certainly become more so once the higher density reconstruction of Owens Park eventually commences. Especially as there is talk of abandoning Whitworth Park hall and concentrating the vast majority of University of Manchester students on the OP complex. [I am better informed of the internal wranglings of the university than I am of TfGM's antics thanks to being at the uni for nigh on a decade now]
I am interested in the infrastructural costs you feel would be attached to this project and the time period of full construction for this project, if you have that information.
Unfortunately all I have is ill informed speculation using exemplars for standard other projects.
Ofcourse if money was no object the curry mile is only ~800m end to end, you could simply tunnel under it with a station at each end. But I think routing one track via Hathersage Road and Birchfields Park is the more viable alternative, then making the Curry Mile one way for access only.
There also the matter of the bus services that you state would be rendered obsolete as the distances currently between the existing bus stops would surely be far less than the proposed tram stops, looking at the Metrolink East Manchester Line as a prime example of a line that runs along main roads.
Well this would clearly not be exactly like the other tram lines - custom at peak times would probably swamp any of the existing routes as they are currently configured.
I would envisage stop spacings of ~400m in the Northern section running through the University (which would be only single lane access, similar to how it will be after the bus priority scheme is completed, but with the bus lanes replaced by the tram lines). However you have a more typical ~800m stop density in the section between the Owens Park cluster and the University cluster (so no stops on the mile itself and none south of Curry-Mile South until you reach OP).
Many of the intermediate stops are actually far more lightly used than some of the others and could tolerate being dropped.
You would also have a spur into the Man Met campus allowing sufficeint trams to be scheduled on the crucial university-OP segment without overwhelming the centre of the system. It would be running enormously intensively. This also relieves the 141 more closely.
It is a very popular bus route and is currently in a very expensive smart route upgrade. Why would the Combined Authority want to spend hundreds of millions of pounds on a replacement? Capacity is another issue with trams down Oxford Road. A frequency needed to match the current bus capacity would be 20tph there is barely capacity after Trafford Park line completion for another 5tph.
The Combined Authority should never have squandered the money on a bus upgrade that will make little difference in the long run - it still tries to squeeze too many buses through the bottleneck, you will just arrive at the Union load/unload chokepoint and the Curry Mile bus chokepoint even more quickly!
Indeed, but how many of the trams would actually run into the centre? You could spur them off into the fancy new Man Met campus which would allow the University traffic to decouple from the traffic into the centre - and the busses are normally relatively empty by the time they get all the way up there.
You would want to run 30 trams, mostly doubles, per hour for much of the day.
I have been trying to work out a proper solution to the traffic problems that doesn't involve dismantling the university and moving it to Jodrell Bank, but short of a very expensive tram scheme with a Curry Mile tunnel, a loop or even a Funitel/3S ropeway I have come up with nothing. And Funitel is out now the Air Line was such a debacle.
[A 3S Ropeway is a little less absurd than it seems, if it ran in a single jump it could manage the ~2230m straight line between the vicinity of the main Owens Park bus stop and the vicinity of the Students Union building in five minutes flat - all day, every day. That would take the sting out of the bus service if it was priced competively, since it would be quick and more importantly
reliable.]