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美国十分重视研究和探索太阳能的应用。目前,太阳能可以用于: ●制作信号和指示装置 太阳能电池用于指示信号、各种警告牌和路障标志灯等效果较好。如路易斯安那州门罗公司生产出一种大型公路交通太阳能箭头指示牌,为往来于施工地段的车辆指示方向;堪萨斯州托皮市安装了太阳能汽车限速闪光牌,节省了大笔开支;从佛罗里达州到加利福尼亚州的公路上,公共交通系统把候车亭上的广
The United States attaches great importance to research and exploration of solar energy applications. At present, solar energy can be used to: ● Produce signals and indicating devices Solar cells are used for indicating signals, various warning signs, and roadblock signs. For example, Monroe, Louisiana, produced a large-scale highway traffic solar arrow signage, indicating the direction of traffic to and from construction sites; the solar car speed limit flash card was installed in Topi City, Kansas, saving significant expenses; On the Florida-California road, the public transportation system puts a