In 1963, MacNaughton announced that Highway 401 would be widened from a four-lane highway to a collector-express system, modelled after the Dan Ryan Expressway in Chicago. Plans were soon developed to apply this model to the QEW between Highway 27 and Royal York Road and to Highway 27 between the QEW and Highway 401, and were unveiled to Etobicoke council on October 13, 1966. Design work followed and was completed by May 1967. This reconstruction once again involved the junctions with the QEW and Highway 401, which were reconfigured into complicated multi-level interchanges to permit free-flow movement; construction began in September 1968. The widening of Highway 27 required the demolition and rebuilding of overpasses at Bloor Street, Burnhamthorpe Road, and Rathburn Road constructed just over a decade earlier.