A few things: The Prague greasing tram runs all hours, day and night. It
greases on the go, so there's no interruption. Hi rail and other off track
vehicles are used for grinding and welding. These vary from Tatra/unimog
pattern, to various specialised hand pushed custom made grinders/welders.
When these are used, traffic is simply routed around them. The changes are
posted on affected stops and on the website a few days before. Sometimes
they will compromise and do this on weekends and in Summer, but mostly it's
any time.

Mark Skinner

On Tue, 11 Dec 2018, 7:22 AM Matthew Geier matthew@...
wrote:

>

>

> 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.

>

>

>

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