On 20/11/17 18:22,prescottt@... [TramsDownUnder] wrote:
> Needless to say, single-ended unidirectional systems don't have these issues, although I guess since they don't carry around a mobile spare parts bin, they can't avail themselves of roadside service ;)

>

It was a unidirectional system were I last saw redundant cabs being
cannibalised for parts :-)
(Belgrade, KT4YU)