Product name: 

RLS (Railroad Lubrication System) / RAAS (Railroad Acoustic Attenuation System) - Trackside/On Board options

Description: 

RLS applies grease to the rail and wheel flange contact area, reducing wear on wheels and tracks.
RAAS dispenses a friction modifier onto the top of rail to mitigate "wave wear” effect and the associated squealing noise.
These systems can be implemented as either on-board or stationary installations throughout.

Web: 

https://www.rivi.net/sistemas/lubricacion-aplicaciones-especiales