Thanks, I will now make a proposal to the city and councillor for bike lanes on Ellesmere Road. Many proposals and ideas I've had were just not politically justifiable. This one I've just measured and it has the width to keep all existing lanes! Ellesmere will be restriped for bus lanes next year anyway.most arterial road lanes in Toronto have already been narrowed. There aren't a whole lot of streets left with excessive road lanes, and in most cases the space savings are not enough for cycle lanes as it results in only a few centimetres saved!
Excessive lane widths is more of a problem in the 905, which generally has a long way to go on that front.
I agree that it should generally be done on the few arterials that haven't yet had their lanes narrowed, though. A quick look at Ellesmere Road through it's 6-lane section shows it could potentially be modified to 3.2m lanes and have enough space left over for protected bike lanes on both sides, for example.