It would make a lot more sense if it was 21C as in Erindale-Sq One-Cooksville then heading to Kipling and Union after, so Port Credit riders at least have Cooksville or Clarkson to head to. Or even if its the interlined with the 29 that already heads to Kipling. This 21S routing however makes 0 sense and even more questionable considering the subway will do a much better job in time given if the Gardiner has traffic.Nope!
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I really hope this is some kind of communication error, because the replacement bus service they have communicated makes no sense whatsoever. They're still going to dump all of the Milton line customers at Lakeshore West stations even though there is no Lakeshore West train, and apparently they are completely abandoning Port Credit, Long Branch and Mimico. Ignoring 416 stations is nothing new to GO but dropping Port Credit is a new low.