It looks to me like flare from the train lights reflecting off either your lens or the filter. If you can get to the same place again, I would try it with no filter on the lens and see if that works better. Also be sure the camera lens is clean.
That's my best guess.
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Thanks, will try to do so, one thing I remember, it was extremly humid that day and a came out of a cool taxi, then I carefully cleaned the lens, maybe this contributed to the effect,
thanks again Eric,
best regards York