This is one of the problems with Toronto. This thread started in 2009 and in that 12 years nothing has been done. Well besides adding a few hundred thousand people to already congested sidewalks and streets.
Quite right to say that problems such as this can and ought to be addressed more comprehensively, more quickly.
But also worth saying that its not quite accurate that nothing has been done.
The biggest amount of sidewalk widening has occurred ad hoc through the development process.
Sidewalk on Adelaide at Yonge, prior to the Bay-Adelaide Centre:
Sidewalk today:
As you can see, the sidewalk was substantially increased in size (and prettied up)
This is far from the only example.
However, it is, as I noted, 'ad hoc', done largely through redevelopment, and as such, not benefiting those sites where no development has happened.
There have been dedicated projects to create more pedestrian space; including the area in front of Union Station; and on Market Street; but these have been relatively few.
Certainly, it would have been nice to see more assertive action.
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But lets note with some optimism; the City just approved this plan for Yonge; the new John Street is set to get under way; and the City is edging towards a plan to widen the sidewalks along Front in the St. Lawrence area, so action is finally beginning to ramp up.