Based upon Amtrak's standards any train traveling over 300 miles is not considered late at its endpoint station if it arrives within 30 minutes of its scheduled arrival time.
Under 300 miles, I think that they only allow 15 minutes.
PRR60 may actually know better than I and correct me, as he's tracked and analyzed this issue. But I think that this is what he discovered while analyzing the Acela OTP.
As for how late, beyond that 30 minute window, Amtrak does not say. However in Amtrak's world where most LD trains were lucky if they achived a 50% OTA, the Builder's 81% is nonetheless impressive. Especially when compared to the Sunset Limited's OTA for April, it was 0%.
Under 300 miles, I think that they only allow 15 minutes.
PRR60 may actually know better than I and correct me, as he's tracked and analyzed this issue. But I think that this is what he discovered while analyzing the Acela OTP.
As for how late, beyond that 30 minute window, Amtrak does not say. However in Amtrak's world where most LD trains were lucky if they achived a 50% OTA, the Builder's 81% is nonetheless impressive. Especially when compared to the Sunset Limited's OTA for April, it was 0%.