Here are the links that I find helpful.

Field Guide to Tank Cars - https://www.aar.org/wp-content/upload...

Damage Assessment - https://www.aar.org/wp-content/upload...

Hazmat Rail - https://www.aar.org/wp-content/upload...

Casualty Prevention - https://www.aar.org/wp-content/upload...

Railroad Operations - https://www.aar.org/wp-content/upload...

Loading Unloading Safety - https://www.aar.org/wp-content/upload...

Rail car Positions - https://www.aar.org/wp-content/upload...

AAR Loading/ Unloading -    • 320 Loading Unloading Tank Cars 1 Com...  

Norfolk Southern Emergency Response - http://www.joinnsoar.com/manuals-and-...

BNSF Hazmat - http://www.joinnsoar.com/manuals-and-...

Transporting Dangerous goods - https://www.cn.ca/en/safety/municipal...

Hazmat Training - https://www.cpr.ca/en/safety/transpor...

CSX Hazmat - https://www.csx.com/index.cfm/custome...

Askrail App - http://askrail.us/

Sertc Training - https://sertc.org/

UP Hazmat training - https://www.up.com/aboutup/community/...