this is for the person who keeps deleting my post, is it you desert rat, someone locked the thread i posted this message in.
Solar traffic signs and street lights still need to be connected to the grid. The issue is that they can only go 3-6 days with minimal charging or no charging. The real solution is
Solar/Wind Hybrid street lighting. This combination is self sufficient, needing no connection to the grid as a backup. Winds as low as 5 mph are enough to allow the generator to recharge the batteries and power the light at night.
This is the real solution to energy saving for cities