I would say centre street is the most likely alignment based on what I observed at the various open houses.
I think the most likely outcome in terms of its grade is an at grade urban lrt. A dedicated ROW like these examples below:
It's obvious trade off is operational speed vs. cost. This would be by far the least costliest and would turn centre street into a transit-focused street. But it does present the opportunity to really use the LRT as a catalyst for intensification along the corridor. I could however see the first station in Crescent Heights be underground, because if it's an extention on the SELRT it would exit downtown underground, under the river and then up the hill toward Centre.
