Not sure how many understand “special vfr” rules. Anytime I personally used it (31yrs ATC), it was by a non IFR rated pilot or the AC was not IFR rated. It has to be requested by the pilot, ATC can not assign it. The pilot was holding because the airspace must be sterilized, which can be a huge PITA. After the special VFR clearance is granted, the pilot is supposed to use landmarks (roads, building, etc) to reach the destination. I never liked using it, because you are basically allowing a non-IFR rated pilot/plane to fly into IFR conditions. Every word each and every controller used will be scrutinized.
