For Gardiner, Metro's ravines and valleys were an untapped resource for arterial roads. Even the popular waterfront Sunnyside amusement park, "the poor man's Riviera," was getting in the way of the motorcar commuter. Sunnyside was demolished in 1955 to make way for the Lakeshore (now Gardiner) Expressway, its main offence that it sat "astride the most important traffic artery of the entire City." Although Metro's ravines were generally protected from development by assertive parks departments in Metro and the city, the Don Valley Ravine was not spared from the building of the Don Valley Parkway. In theory, expressways would protect cyclists and pedestrians by taking cars off local roads, except that motorists inevitably exited the expressways and filled city roads.

— Wheeling Through Toronto by Albert Koehl (Page 130 - 131)