Yes they are always on.....you are totally correct....I remember seeing those popping up and the old cylinder ones has very much been discontinued of use....except during my last visit in June.....I actually saw ONE orange cylinder one still working!!!!!!!
This is also the NYC "custom quarterloop arms" which the arm is actually roughly 10 years to 15 years newer than the pole itself...if you look carefully about 3 to 4 feet BELOW the arm mount....you will notice a small bump which used to be a small a brace mount for the previous arm which was a curved braced upsweep