In a post today, Andrew Barton talks about how Torontonian urban plan means, among other things, that Scarborough (and other Toronto areas) have very low densities and car-designed neighbourhoods. This is the city we have, if not the one we'd like.
Until the postwar suburbanization boom, Scarborough was essentially farmland with isolated pockets of development here and there; I like to think that it resembled eastern Lulu Island or the undeveloped parts of Surrey's Agricultural Land Reserve today. With no constraints save those imposed politically, Scarborough's reeves and mayors oversaw the plowing under and paving over of more than a hundred square kilometers of land with new developments designed and built in accordance with the prevailing wisdom of the time: namely, that the car was king and everyone would be driving everywhere. What there wasn't any planning for--what there wasn't even any thought spared for, apparently--was how to integrate transit with the city once it reached the size to warrant it.
Even in the wake of the general streetcar abandonment of the 1950s and the rush to cars across much of the West, it's not as if cities didn't plan for the future. In Calgary, separated rights-of-way were reserved for transit usage decades before the city's C-Train system started rolling. In Los Angeles, Pacific Electric's rights-of-way were maintained even after the streetcars were removed, and today the modern Expo Line runs along one of them. In Coquitlam, where the in-progress Evergreen Line extension will finally bring SkyTrain service, development has been oriented around the expectation of rapid transit service since the 1990s. In Scarborough... in Scarborough, looking on Google Maps, the only empty corridors I can find are two hydro corridors, one paralleling McNicoll Avenue and another reaching from Victoria Park to Meadowvale.