Does anyone know of a solar panel product or products that works onto of traffic signals to provide power for the traffic signal. I have seen these around my town and am interested in the product's maker.

Ontario has solar powered highway merge/caution signs set up on the 40l where they are doing lane regeneration. If you could go on Google and find out where they source it from then you would know. You could possibly access Google by putting in 'Government of Ontario' and then going from there.