In the fall of 1991, alongside the widening of Highway 410 into a full freeway, construction commenced on the planned but not-yet-built parts of the interchange. New links were added to connect the section of Highway 401 west of that interchange including an eleven-span semi-direction flyover from Highway 401 eastbound to Highway 410 northbound and a directional ramp for the opposite movement. A semi-directional high-speed flyover replaced the loop ramp from Highway 410 southbound to Highway 401 eastbound. The removal of that loop ramp freed up right-of-way for connectors between Highway 403 and Highway 410 which pass under the existing bridge structures for Highway 401 collector traffic, while new overpasses were constructed in the centre for Highway 401 express lanes. Prior to the opening of these links, traffic from both freeways was forced onto eastbound Highway 401.