On Tue, 11 Dec 2018 at 07:16, Prescott lenkaprescott@...> wrote:

> I think that the days of Australian tramways buying rail-based service

> vehicles are long gone and I suspect that's also the case with any "modern

> light rail" around the world. Too commonsensical.

>

> 'hi-rail' equipped light trucks seem to be relatively common on these

'modern light rail' systems.

Many modern systems are not a 'network', but just one or two lines. If your
maintence vehical is rail based, every time you want to use it, pretty much
the entire operation comes to a halt.
A hi-rail can be removed from the line at any point that has a suitable
flat surface clearning the tracks for revinue service quickly.