Since no one has responded with some recent experience I guess I can try to give some answers.
It's been almost a year since my last visit to the fabled Bayview Junction and at that time there was no sign of barbed wire or snipers waiting to pick off errant railfans.
Yes, there have been additional tracks added to the east of the rail triangle along with new signals. To the south and west there are still just two tracks on the CN heading off each way to London and Niagara and the single track joining west to south. On the CPR line, not much has changed.
Of course,the railroad right of way is off limits and, like all private property, always has been. But there is plenty of public property in the area (including the Royal Botanical Gardens parklands and footbridge) from which to view passing trains. There should be no worries about a trip to Bayview and the experience should be as good as (or better) than 10-20 years ago.
Ken V. Moderator: Most things Canadian.
Any time could be train time!