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Truss Lighting
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Truss lighting used by MTO to light all the freeways until around the early 90's. Since the early 90's they have been disappearing at a extreme rate. Only some are still left and those last ones are going to be removed later or some get put onto tapered e arms
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The 2 OVX's at the traffic light are still there and this OVX
I think they left it because its lighting the on ramp for the highway 427 and that the highway lights are still all HPS
Today I saw LED's installed on the same road you did (Derry Rd.) but over the 410 overpass, offramp signals too! It looks like all streetlights on MTO overpasses are city jurisdiction. It's odd as they only limited their efforts mainly to the 410 and 427 overpass stretches. I also notice the fixtures that replace 250W and 400W look exactly the same with same amount of LED panels.
I don't know what else they'd be called.
I wonder how long it will be until the Brampton overpasses become LED as well.