A question for the train enthusiasts.

[Zurdo]

It's one way to indicate which way it is travelling, which may seem obvious...but so too with cars - no white lights to the rear, and there are rules for reversing lamps. You may have noticed headlamps on trains too - why ? It's daylight, there are no other vehicles on it's track, why are those headlamps on ? So we know which way it's travelling...if there is a loco on the end of a train, it will show red lamps, showing which direction it is moving. Obviously this is only for stupid people...right ?