here is a link to
last year's feasibility study
The study estimates the cost of constructing one-way LRT rail on a road at $15m/km, and the cost of placing both lanes on one road at $25m/km. The distance from University Plaza to Eastgate via Main Street is about 16km. The return trip via King is 17km. If LRT is run along Main alone, the cost of the rail construction would be about 16x$25m, or $400 million, while the cost of running the split lane concept would be 16x$15m + 17@$15m, or $495 million. So, running both lanes of LRT along Main is $95 million more cost effective.