Cal-P Wrote:
-------------------------------------------------------
> How right you are,it is a heavyweight car noting
> the riveted skin and elevated roof just above the
> isle. And 3 axle trucks too!
> This railfan is speculating at the mission that
> this was built for?
> I fond see any track geometry instrument near the
> rails.
> Looking at the roof between the solar panels maybe
> air intakes.
> Maybe air is sucked in and analyzed on instruments
> aboard.
> Or air is sucked into particle filtets and they
> are later analyzed.
> With all the cost saving goals at UP there must a
> good reason to drag this
> mobile lab around.
> Cal-P


The car has been used on PTC test train for several years.

[youtu.be]