I have seen a bunch of those types in New York and Massachusetts...except they had bucket streetlights which are Holophanes and I think above is also an Holophane also....

There is a bunch of them found in New England Thruway in New York all the poles point the same direction which is to the north! I find that somewhat creepy...

There's another row in New York called Interstate I-190 which usually has a setup that alternates back and forth each side of road and sometimes one side for a distance see here....WEIRD!!!

Nope thats A GE HMAA, also this is not really a high mast, it just uses that style of fixture

Actually Yes this IS a highmast GE's website even says its a High Mast.

Form109....I think what Gailgrove means is that this whole setup is not an highmast but whoever installed this fixture decided to use a highmast fixture on this setup......

Gailgrove....Those things are sorta a highmast...those setup are pretty tall if you look at the streetview I posted in link, instead of multiple fixtures they use single fixtures and they all are closer between each other than the real tall highmasts.....but still a bit spacey....They all light up 360 degrees on the median.

I've seen this style of lighting before on I-190, they were setup so that they alternated back and forth on some stretches and faced the same direction on some other stretches. I have a pic of them here but the pic turned out a bit blurry.

I believe this style of lighting is called a median mount system or at least is what the Holophane website calls this sytle of highway lighting. See Here

Yes thats what I meant I know the fixture is a High mast style, but the setup is not.

What the site says about this lighting system does make a lot of sense, but it just looks really silly.