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.
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