Holophane bucket style Highmasts found in Baltimore City
Those date to very late 70s to early 80s. This part of the highway didn't open up till the 80s though. Those are found in I-95 inside Baltimore City. Those are HPS.
I kinda found out the dates of those.....the exact section of the highways snapped for those are dated to 1977-1978! One of my friends who grew up in this area told me he saw those go up in the late 70s and the tunnel which isn't too far off was completed in 1985...so that makes sense!