|Solar traffic signal|
Every time I see these signals on a state highway, I am thoroughly intrigued, wondering about them. I wonder how much each costs, wonder if one of these would be helpful in heating northern greenhouses that cannot keep things warm enough in the winter. Mostly, I wonder if one would help to keep my hens' water from freezing.
That reminds me. I must get rechargeable solar batteries for my three outdoor yard lights that I bought during the 2011 tornado. They served very well to keep me from stumbling around my house or using candles and chancing a fire.
Maybe everyone else sees these solar-powered signals regularly. I have never seen them on the interstates. Have you?
Do you ever see these solar operated signals? Are they common? Does anyone have a ballpark figure as to the cost of such a system?