Rendering of the Green Ribbon showing new life both above and below the Gardiner Expressway. Image courtesy of Quadrangle Architects Limited.
Just weeks after City Hall's executive committee approved yet another lengthy analysis of the future of the Gardiner Expressway, a notable design firm has introduced a fresh concept into the twenty-plus-year-old debate. At last week's tenth annual ideaCity, Les Klein, founding partner of Quadrangle Architects, called for building a green roof on top of the roadway, complete with parkland, cafés, and bike paths stretching from Dufferin Street to the Don Valley Parkway. His proposal for the Gardiner, which was met with a standing ovation, demonstrated that thinking way outside the box might be the best way to move forward from this highly cyclical discussion.
For over twenty years, politicians and urban designers have debated the fate of the Gardiner Expressway. Various studies have analyzed, proposed, and re-analyzed various combinations of tearing down, tunnelling, ignoring, and rehabilitating the Gardiner. In 1990, the Royal Commission on the Future of the Toronto Waterfront first suggested the removal of the entire elevated Gardiner Expressway and replacing it with a network of tunnels and surface roads. In 2004, the Toronto Waterfront Revitalization Corporation issued a report to the City about possible options for the Gardiner, which was released to the public in September 2006 and continues to be discussed.
Accepting the reality that the expressway is not going anywhere in the near future, it is time to entertain proposals that develop and reprogram the Gardiner’s site, making the large-scale infrastructure inhabitable at a pedestrian scale. Klein’s Green Ribbon is not intended to be read as a set of instructions for construction, nor does it address every single issue that Torontonians have with the aging Gardiner. As Les Klein told Torontoist, "My goal is just to engender some rational debate about alternatives."
There are several other design possibilities put forth in recent history that also celebrate the elevated expressway as an urban architectural object. Aside from the obvious options, a number of creative proposals can certainly perpetuate a conceptual discussion on the topic.
Rendering of the future Gardiner by John van Nostrand of regionalArchitects and Calvin Brook of BMI/Pace.
In 2003, The Toronto Waterfront Revitalization Corporation commissioned architects Jon Van Nostrand and Calvin Brook to examine the possibility of retaining the Gardiner Expressway. The result was The Gardiner Expressway Transformation study [PDF], which recommends incorporating the Gardiner into the urban fabric through a series of interventions that promote north–south permeability. The major recommendation is to realign Lake Shore Boulevard to provide space for new amenities, public spaces, outdoor markets, and recreation areas beneath and beside the expressway structure.
Brook—who has developed his ideas about the Gardiner since it was his thesis project at Harvard in 1985—and van Nostrand also envisioned significantly amping up the level of plant life. They suggested planting on the barriers that separate the expressway's east and west lanes and introducing vines on the side rails of the Gardiner so that greenery eventually dominates the columns. The study also proposed a skating rink under the tall pillars at Bathurst Street, bike ramps rising over Parliament Street onto the railway viaduct, and introducing a colourful, landmark lighting installation to arch across the Gardiner and complement the CN Tower’s LED facelift.
Rendering of Chloe Li's Vision of Mobility, from her University of Waterloo Master's of Architecture thesis [PDF].
A handful of ambitious students have independently recognized this opportunity as one that requires a more radical solution as well. An example of such is a project proposed by Chloe Li, a former University of Waterloo student who wrote a Master's thesis on the Gardiner, suggesting a responsive transit interface with integrated systems of mobility—featuring Jetson-looking transport pods for everyone. Yet another creative suggestion is the potential reappropriation of the Gardiner as an agricultural hub, as recently displayed at the Design Exchange's Carrot City.
Rendering of the proposed Green Ribbon overtop of the Gardiner Expressway. Image courtesy of Quadrangle Architects Limited.
As Les Klein reminds us, “part of the beauty of conceptual ideas is that they are simple. Not simplistic and not simplified, but simple.” Simply put, this exercise “empowers people to think of things in other ways.” Certainly, most of the above proposals would benefit from some tweaking and editing, but together they present a strong argument: we should take seriously the benefits and opportunities that our beloved elevated transportation corridor provides this city and its designers.

These conceptual drawings might be more interesting if they included the giant ass condos which pretty much border most of the Gardiner now. (And since they aren't going anywhere, their existence is probably one of the better arguments for keeping the Gardiner up.)
i like the creativity. but my solution is more practical. Make the whole gardiner a toll road and use the money to build a billion dollar tunnelled gardiner from the Ex to the Don Valley. the big negative of the tunnel option is price, but as the tolls on the relatively unused 407 have shown, that cash can go a long way for massive capital improvements. tolls would be complemented by increased public transit (see: Metrolinx), which people in the burbs already use extensively to avoid driving into downtown and paying for parking.
Then you could build pretty ground level parks with bike paths across the whole distance rather than have them so high up.
Imagine a massive park between the CN Tower and the condos? awesome!
Despite all the arguments I've heard to the contrary, burying the Gardiner remains my favourite option as well.
The reaction to this proposal over at Spacing was pretty much blech, and I tend to agree. http://spacing.ca/wire/2009/06/18/green-roof-meets-gardiner-expressway/. As posters there point out, you'd have to walk up the equivalent of a six-storey building to get to the park (not exactly for would-be flanuers), and once you got up there, you'd be sucking down exhaust from thousands of vehicles per hour. Plus what happens when the understructure (current Gardiner) starts to collapse?
He got a standing ovation at IdeaCity? I'm guessing alcohol must have been a factor.
This barrier would be even higher and make the structure even more difficult and expensive to maintain. The artist renditions are unrealistic, where's the condos? How do you get sunlight under the overpass?
I'd like to see it taken down but if this is the alternative then I'd like to see it left alone.
They must not be busy at Quadrangle these days... well, they do design condos over there, after all.
I thought one of the reasons to pull the Gardiner down was that the structure was crumbling and because it was in the way?
I've recently heard from the architect that the "Green Ribbon" is really just an experiment to see just how far some pretty renderings can take a really, really bad idea.
I tried to tell him that the Landmark Building Group is already pursuing this thesis, but he simply wouldn't listen.
This is Toronto, so any proposal that relies on plants means it will be an ugly, dead, useless thing 6 months of the year.
Bury the eyesore and put pedestrian bridge-gardens over Lake Shore Blvd. Leave the columns if you want, cover them with green, wrap them with cafés, top them with ball courts, whatever you want, but get rid of the concrete slab they support.
again: what about those horribly ugly CityCentre condos that are all around the Gardiner?
there are TWENTY of 'em that will be built.
the Gardiner is not a barrier between the city and the lake: the CONDOS are the barrier. and you cannot bury the condos. sadly.