ABSTRACT by Shannon Ross During the 1960s large trenched expressways were introduced into our urban centres to accommodate the booming vehicular traffic. These expressways were built on an enormous scale, often traversing entire cities. Unfortunately, some neighbourhoods have been divided and now share a noxious physical boundary. The Vine Street Expressway in Philadelphia, the Cross Bronx Expressway in New York and the Décarie Expressway in Montreal are examples of such thoroughfares. They are noisy, polluted...