From Risks digest which is published by the Assocaition for Computing Machinery (of which I am a member).
In 2004, a politically controversial decision was made to cease operationsWould it necessarily be the case that air-brakes are inadequate in such a situation? Or what other factors?
of BCRail, and sell a 999 year lease to CN.
A section of the line near the town of Lillooet is known as one of the
longest continuous mountain grades in Canada. BCRail used dynamic brakes.
CN used air brakes, and confirmed this decision in early 2006, despite
concerns raised by employees.
On June 29, 2006, a train derailed on that section, and two employees died.
The Transportation Safety Board (TSB) has now ruled that the failure was
caused by an inadequate braking system used in the steep mountain canyon.