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1960s or 1970s?

Started by traffic light guy, September 14, 2015, 10:09:15 PM

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traffic light guy



You now older PennDOT installations like these, consisting of Eagle Flatbacks, Crouse-Hinds Type Rs, and occasionally an Econolite Bullseye. I'm pretty sure these installations date to the 1970s but I may be wrong since Eagle dropped the flatback line in 1973, but the odd thing is these were mounted on brackets, and signal astro-brackets weren't invented until 1968. Plus thousands of intersections in Pennsylvania had this installation, so they could've possibly did a quick period where they rapidly installed signals in Pennsylvania from 1968 to 1973. Plus some of these installation have Doghouse signals in which weren't approved by the MUTCD until 1971. Lots of people online claim these are from the 1960s, but I've been looking at old photos of these installations and the earliest photo of this install was from 1976, someone help me figure this out. :hmmm:


traffic light guy

Pennsylvania primarily installed 12" Eagle flatback heads between the years of 1967 and 1978. What you're looking at probably dated to about.....1973, 1975 at the very latest. Mast-arms became commonpratice in PA in 1968, these types of mast-arms, Poles Inc, stopped being used in 1977. Although the flatback heads ceased production, the state had extra signal heads in a storage closet, thus PA has installed flatbacks for as late as 1976!



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