Rail Safety National Law National Regulations 2012

A safety critical integrated engineered system has failed, or is suspected to have failed, in an unsafe manner and not in accordance with the system’s design principles, including in relation to the following systems—

active level crossings;

signalling systems;

authority management systems;

rolling stock interlocking systems;

train protection systems;

electrical traction systems;

track detection systems.

A total failure of level crossing warning lights or boom barriers.