I just passed through there last weekend.  The QEW from Toronto to Niagara was bumper to bumper stop and go.  We lost hours in that mess.   I think I could have made better time on my bicycle for a good part of it.  We eventually exited the QEW and wandered towards Niagara Falls using country roads, dead reckoning, Papa's memory, a compass, intuition and the advice of locals.  Things really improved once we got off.
Bring a good map or Garmin!