Hazard and mitigation for Level crossing examples

[StrongLifts5x5]

I am preparing IRSE M5 level crossing questions for review. Hazard and mitigation for level crossing (e.g AHBL,ABL etc) are the hot topics in the past paper.

Are there any resource or information which can summarise the operation, hazard and mitigation for candidates review of M5 level crossing questions?

Thanks

I used these, also the IRSE red text book is good

Darren