What is that called?

[DesertRat]

What is that thing they run on the tracks I've seen a couple of times that that seem to be welding or doing something to the tracks? Looks like a loco with a million wheels with lots of sparks going. At least what it looks like to me.

 

[MrFSS]

What is that thing they run on the tracks I've seen a couple of times that that seem to be welding or doing something to the tracks? Looks like a loco with a million wheels with lots of sparks going. At least what it looks like to me.

Probably a track grinder. Smoothing the rough places out.

 

[Crescent ATN & TCL]

What is that thing they run on the tracks I've seen a couple of times that that seem to be welding or doing something to the tracks? Looks like a loco with a million wheels with lots of sparks going. At least what it looks like to me.

Probably a track grinder. Smoothing the rough places out.

Doesn't it also reshape the railhead from where the weight of the trains create "lips" on the sides?

 

[gswager]

What is that thing they run on the tracks I've seen a couple of times that that seem to be welding or doing something to the tracks? Looks like a loco with a million wheels with lots of sparks going. At least what it looks like to me.

Probably a track grinder. Smoothing the rough places out.

Doesn't it also reshape the railhead from where the weight of the trains create "lips" on the sides?

Yes