There's a whole rest station off of I-93 North in Manchester NH that's lit entirely with MV bail latch M-250Rs and MV PF-400s. I noticed all the NEMA heads i've seen in NH are MV while MV cobraheads are pretty uncommon. Where i stay near loon mountain, it's all 250W HPS M-250A2s and 150W HPS M-250A2s. There are a few 70s M-400As and modern M-400As but they're HPS too. There was even a gas station lit by HPS! It looked like the gasoline caught a spark once dusk fell.
I remember seeing gas stations with HPS around eight years ago, but they are all MH, LED or induction now. Not many MV lit rest stops left here, there was one that had MV B2213s and another that that had 175w MV canopy lights (also demolished).
I know of some malls and subway stations still lit with MV though, I know of one with greened cleartop 175w Sylvanias. Interestingly until recently the subway here was filled with old lumes (fluorescent and street) dating back to the 50s.
There's a rest station off of I-295 about 20 minutes from my hosue that was lit by 60s M-250Rs. It's been closed for years They're doing work on it know and the lights will likely be gone soon. The wooden poles and wooden arms are rotting and dropping the fixtures left and right.
These are Public service of New Hampshire (PSNH) poles which is another sister company of mine. NU is 3 states big and consist of 4 electric utilities and 2 gas utilities and 1 transmission utility. There is alot of mercury still in the seacoast region of the state.
Narragansett Electric, Mass Electric, Nantucket Electric, Newport Electric, and I think a couple others, were divisions of the New England Electric System (NEES). National Grid bought the entire NEES as well as parts of NH and upstate NY. The own the majority of the tranmission lines in the UK too. That's where NGrid originated as well as the name "National Grid". When they came to the northeastern US they were new to local power distribution. They only owned (and only own today as well) country-wide distribution. Liberty Utilities took over National Grid's turf in NH, though NGrid is still helping LU out.
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I know of some malls and subway stations still lit with MV though, I know of one with greened cleartop 175w Sylvanias. Interestingly until recently the subway here was filled with old lumes (fluorescent and street) dating back to the 50s.