Yes, the big problem on St. Clair is during off-peak hours when it becomes a one-lane road in each direction.
While I'm glad of what happened on St. Clair, it's wrong to believe that dropping that lane during most hours of the day was the only thing that happened to slow traffic. During all hours, the narrowing of the lanes and the increased channelization forces the vehicles to slow down to navigate the twists. Other than at the underpass between Keele and Old Weston Road it's an acceptable price to pay to improve transit.
On the Queensway the question is whether putting in an LRT would lure enough people on to transit. Currently there's a bus along that route once every 30 minutes at off peak and peak hours, which increases to once every 24 minutes between 9:30 AM and 3:30 PM. In other words, the modal split here is really, really bad. They simply could not justify the expense of building an LRT along here without attracting many times more riders to this bus route in the first place.
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