A subway train can't fly (or at any rate shouldn't
Foglights work best when the beam is aimed so it's LEVEL to any
practically measured distance.
IF they are mounted high they by definition are being shined high,
OR they are being aimed downwards to prevent glare either of
which reduced their effectiveness.
I'm trying to tell you that the lower you mount them the better they work.
Here in the US the laws reflect when they must operate
(off with the high beams in most states)
In europe there are laws that specify WHERE they are mounted (height etc)
Those laws aren't exercises in arbitrary authoritarianism they are based
on functional reality.
You can still mount them any way you want to.
I'm advising you that if you mount them low they work MUCH better.
but again have it your own way.
I can tell you the truth, if you refuse to believe it you are on your own.
I've done my job.
You've given me the finger.
have a nice life.
Me? I just like my lights to LIGHT THINGS rather than simply "look good".
AD