sentences:  Construction started in October 1965 and Turcot was built in time for the 1967 Montreal Expo, along with other big projects such as the Montreal Metro.Upon its erection, an old railroad yard belonging to the Grand Trunk Company (today merged into Canadian National) served as location for the interchange and was shortened by 25%, which required the demolition of a roundhouse.In 1969, upon reviewing the situation, city authorities concluded that the project used unnecessary space and could have co-existed perfectly alongside the buildings that were otherwise demolished, including some 20 residences.