The 1950s and 1960s was a time of great change in the area. The federal government built the Tunney's Pasture office campus at the north end of Holland Avenue. The rail line along Scott Street was closed and eventually became the Transitway bus roadway. To the south, the Queensway/417 was built, partly on old rail lines, and partly directly through demolition of homes along its path. This provided another bypass around the area, and also lead to an increase of automobile traffic along Parkdale.