I work at a rail transport infirmary. Have you heard of this?
I know that a rail transport is a means of transferring people or goods on rails or tracks, but what's an infirmary? 
Yes you're right. Infirmary is just a storage area for transport parts. 
Oh that's neat! Do you mostly handle electric locomotives or engines that are run by diesel?
My work mostly involves electric locomotives since these are the most efficient and used almost everywhere!
Very nice! I always though railways are a very safe land transport system. Would you agree?
I agree yes. Not only safe but also environmentally friendly and quick!
Other variations are also possible, such as slab track. This is where the rails are fastened to a concrete foundation resting on a prepared subsurface.
Rolling stock in a rail transport system generally encounters lower frictional resistance than rubber-tired road vehicles, so passenger and freight cars (carriages and wagons) can be coupled into longer trains. The operation is carried out by a railway company, providing transport between train stations or freight customer facilities. Power is provided by locomotives which either draw electric power from a railway electrification system
Rail transport
Rail transport is a means of transferring passengers and goods on wheeled vehicles running on rails, which is also known as tracks. It is also commonly referred to as train transport. In contrast to road transport, where vehicles run on a prepared flat surface, rail vehicles (rolling stock) are directionally guided by the tracks on which they run. Tracks usually consist of steel rails, installed on ties (sleepers) set in ballast, on which the rolling stock, usually fitted with metal wheels, moves.