TSW's famous QA has lead to a small update to correct Day 0 bugs:
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The latest update for Train Sim World brings in appropriate product fixes for the Amtrak SW1000R Loco Add-On, specifically for the Ex-Metroliner Cab Car included in that pack. We are also taking this opportunity to introduce general core code fixes:
Ex-Metroliner Cab Car
Enabled ATC/ACSES Systems
Fixed an issue whereby cab's fuse box could not be closed after opening
Fixed an issue whereby the cab car achievements and trophies were not obtainable
Revised service timetable to reduce the delays experienced awaiting red lights to clear
General
Fixed an issue whereby legacy stats could crash when reading from profile data
The approximate download size is 432.5 MB
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The indicated download size is when you have all the DLC. My TSW only got a 135 MB update to the core .pak and the NEC:NY .pak
Apparently the lone GP40-2 DLC still hasn't got the required physics update?