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Hubbell RMG in Rhode Island
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Yeah these were used on the freeways a little bit. I've never seen one on a truss pole before. I've only seen them before on davits. They're not common at all though. There are a couple of these (including this one) on Rte 138 at US 1 and on Rte 24 right near the Mass-RI line.
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When you meantioned the poles change on I-95, did you mean here in Warwick? Or did you mean here in Providence? on the short old davits I saw a 1982 picture and apparently they all originally had flatbottom Westinghouse OV-25s from 1957 (since that's when I-95 was opened). now they all have 250W HPS M-250R2s except for a couple 400W HPS newer M-400s that were just spot installed at a couple of sharp turns in the Providence area for more light.
Hmm I never knew there were lights on those tall round davits before the M-400R2s. I figured the M-400R2s were the originals. Now the lights are M-400R2s and newer M-400s. Some of the lights are relay controlled and other sections are photocell-controlled. I don't know why it's not consistant though. every mile stretch or so it alternates. i never knew they used HPS Westies here either. Were they the older round style silverliners or the later boxy "l-series" lights? Man it would have been awesome to have been around when there was such a variety here. There still is a good variety but nothing like what you describe!
i never saw the RLGs or ITT 25s on the very round davits. Were they HPS? If so i wonder why they changed them all to M-400R2s.