The systems installed directly on the rail vehicle or maintenance carriage are considered mobile applications of lubricants and friction modifiers. The advantage of a service lubricating vehicle is its flexible use - such a vehicle, equipped with a variable system of spraying, can help to solve an acute noise problem effectively and quickly.
Part of the solution lies in the use of the vehicle's GPS signals.
http://www.sklenar-tribotechnika.cz/en/m-123-vehicle-lubricating-system/