As of yesterday evening, this crash already had a wiki page. It’s amazing how those get created so fast…
All the CEM in the world probably wouldn’t have helped the driver of the 360. This is the nose profile of the Aurora he hit:
The European crashworthiness standard EN 15227 doesn’t cover all possible accident scenarios.
Quote from EN 15277, 1. Scope from 2005 draft:

Source: https://de.scribd.com/document/475157811/EN-15227-Railroad-crashworthiness-standard
The website contains a link to a pdf but you need to register. Otherwise you need to scroll down to page17, Annex A
As far as I can recall, EN 15277 covers approximately 90% of the accident scenarios recorded in statistics.
Regards, Volker
PS: The 2005 draft was the newest I was able to find on internet. To get the standard you need to pay even for a draft for comment.
Here is a direct link to the 2005 draft: https://www.roadsafellc.com/NCHRP22-24/Literature/Papers/EN_15227/EN%2015227_Railroad_crashworthiness_standard.pdf
Thanks!
