How do they know if your layover at Union was 3 hours, or 2 hours and 45 minutes?
If you catch the early morning train at Niagara Falls and tap at 6:15 AM, arrive in Union at 9:04 AM, then catch the next Barrie train (9:54), and arrive in Barrie at 11:37 AM. Let's say your are just 10 minutes...