Dear Riny, I. OK, in which objects should be removed; the pedestrians? II. A yellow filter might caused a strange tone, according to yr point of view...Or it could b my wrong judgement over the Kelvin scale of 65 hundred featuring in this photograph so that the photo before converting into BW turned slightly out to be green+yellow, too much and that'd caused a strange tone once cooperating with a green channel (yellow filter) via channel mixer in Photoshop. (I know so little about photoshop, just learned a little bit about how to converting from color into BW and what'd b the best tool.)
I do appreciate so much your comment and you would be my photographic improvement. Best regards, PC