The 401

[sonysnob]

The advanced widening at underpasses for roads below the 401 were constructed for solely for construction staging purposes without a real consideration for the long term widening needs of the 401.

That said, pretty much all of the underpass widening should be more or less incorporated into the future design of the 401. The only real challenges may be at the overpasses at 16 Mile Creek and Campbell Avenue east of Campbellville, particularly if the MTO ends up actually building a westbound climbing lane between the Tremaine Road and Guelph Line interchanges in addition to the proposed widening.