This is a somewhat crude analysis, since it is using generalized figures from the UK Highways Agency on road capacity, but the figures should not be that much off the the mark. The traffic volumes are based on real data from the City of Toronto. Note that the 3,300 vehicles per direction in the peak hour is based on a six-lane dual-carriageway, urban road, since there is insufficient data on eight-lane urban roads to create a generalized figure. However, six-lanes is actually what University Avenue becomes when bike lanes are in, so 3,300 can be used as what capacity will be during the pilot project.
In short: excess capacity, yes. “GRIDLCOK!”, no.
To be fair, I was riding down University Avenue around 9:15am at the tail end of rush hour, but there was little of this ‘GRIDLOCK!’ seen.

Few cars heading southbound at College Street

A queue at the pesky intersection at Gerrard Street just as the light turned green

Which cleared, as expected, within seconds.

So much GRIDLOCK!
First of all, I give Rocco Rossi a bit of credit - the Beverley and St. George bike lanes are indeed great. Little does he know, however, in applauding the great bike lane we have there, he is in fact endorsing reducing car lanes and bringing us to something he does not pay much attention to: the truth.

source: Transport Canada
Transport Canada cites St. George Street as a best practice example in road diets, a concept in road design where travel lanes are reduced and is rebalanced to provide more space for cyclists and pedestrians. St. George Street, despite losing one travel lane in each direction, still carries the same number of vehicles it did before the diet, the number of collisions decreased by 40%, and the number of cyclists increased by 10%. Most importantly, it’s created a place in the heart of the University of Toronto campus, and is often described as one of the most pleasant places to be in the city.
So onto Rossi’s assertion that adding a segregated bike facility on University, the first of its kind in the city, will cause GRIDLOCK! There are two things completely wrong with this assertion. First, University Avenue has excess road capacity, and operates at an above acceptable level of service throughout the day. And second, it may come as a complete surprise to Rossi, but my belief is that reducing University Avenue by one lane in each direction will actually improve vehicular flow.
UNIVERSITY AVENUE IS NOT AT RISK OF ‘GRIDLOCK!’
I ride my bike up and down University Avenue on a daily basis on my commute, and I have seldom encountered these ‘gridlock’ conditions Rocco Rossi is speaking about. In fact, it is quite the opposite. There is excess capacity even during rush hour. These photos taken on my bike ride home this afternoon between 5:30 and 6:00 p.m. prove this excess capacity.

University Avenue at Queen Street, looking north, at 5:45pm

What may appear as ‘GRIDLOCK!’ at Gerrard Street…

…cleared within 10 seconds of green time
The greatest irony is that in this location where I observed the greatest northbound delay in car travel, it was caused because of the advance southbound left turn signal. As a result, the northbound traffic is delayed by several additional seconds. So in this case, it is actually cars causing ‘GRIDLOCK!’, not cyclists.
Finally, a look at picturesque Queen’s Park. Check out all that ‘GRIDLOCK!’ blocking the view of this fine piece of architecture.

I will take similar shots during the morning rush hour tomorrow to document alleged ‘GRIDLOCK!’ conditions.
HOW UNIVERSITY AVENUE COULD IMPROVE WITH BIKE LANES
My theory, that similar to St. George Street, and with many successful road ‘diets’, reducing University Avenue by one lane in each direction, between Wellesley/Hoskin and Richmond Street will in fact improve traffic operation on the street. Why? University Avenue is inconsistently configured, leading to bottlenecks, constant lane changing, and confusion for unfamiliar drivers. Here is how the street is inconsistent:
It is at the Wellington Squeeze, as I will call it, that congestion becomes a problem, as impatient drivers try to cut around cars. Similar issues occur at Bloor Street and Richmond Street, where the street narrows. So when the segregated bike lane is placed into the eight-lane section of University, it will finally standardize the road configuration throughout its length.
IN CONCLUSION…
I am absolutely certain that if there was a serious risk of ‘GRIDLOCK!’, the Transportation Department would not be proposing such a bold move without further study. You see, I trust the bureaucrats that run our City, who have dedicated their education and careers to their field. Should the public trust them? Or should they trust Rocco Rossi, whose only expertise is in divide and conquer politics, grandstanding, and manipulation of the truth.

Taxis parked on bike lane on Lower Simcoe Street (source)
In The Star today, they ask, “So, this is a cycling city?” in response to a rather frustrating article about police inaction with taxis parked on the new bike lanes on Lower Simcoe Street, first brought to light on Duncan’s City Ride.
So given the slow action on the City’s bike lane network, the continuous fight for every inch of bike infrastructure, and two leading mayoral candidates that seem to not understand the need for a comprehensive cycling network, instead of asking, “this is a cycling city?”, I ask, “Is Toronto a cycling city to begin with?”