Cars are the most space inefficient method of travel, unless you somehow managed to introduce flights from Pearson to Billy Bishop.
I think you forget buses and streetcars share road space as well, and are far more efficient then cars.
Which will become permanent. Everyone who's on a bike is taking up less road space, or transit space.
How do you know this? Will the Yonge Street bike lanes become permanent automatically even though they are currently temporary? I understand your pessimism because we're talking about Toronto, but have a bit of hope.
How can you do that on downtown streets?
Again radical, but get rid of on-street parking on a couple arterials and make them transit/HOV lanes during peak periods at least. Businesses will hate it, but they will already be losing business because of the heavy/lengthy construction.
We need to stop treating cycling infrastructure as optional. With the population of Downtown Toronto set to double, and with Downtown’s subway and streetcar network remaining grossly inadequate, the only way we’re going to move that many people efficiently across the core is with huge upticks in walking and cycling. Cycling is very much key to future growth and vitality of the core.
Trust me it pains me to say it, but bikes will not move anywhere near the amount of people in the downtown core compared to transit. Most especially in the winter time. Im not saying get rid of them forever, but this is a case where we have a critical infrastructure project that will effect tens of thousands of people for what will be almost a decade. Like I said it's a radical idea, but it needs to be considered in this specific case. I'll give you an example why: a commute via TTC from Etobicoke to Yonge/Queen taking 1 hour today will easily turn into 1 hour 30 mins at the minimum once this project gets underway.
Which brings me to another point: fare integration better damn well be in place long before this project sees heavy construction, because very few will be willing to put up with that kind of dreadful commute.