> No safeworking system is perfect.
> All that you can expect or hope for is that the safeworking system will
> endeavour to ideally prevent or at best minimise accidents in the event that
> the driver does what all human beings do at some time or other , makes a
> mistake.
When you look at reports on accidents, there is usually a number of contributing
factors. It is very rarely just one thing.
-- David Johnson CityRail Guard trainman@ozemail.com.au http://www.ozemail.com.au/~trainman/