考虑横道线的交通灯的控制,设有红,绿两盏信号灯,一般是红的亮,路边设有按钮SF, 行人横穿街道时需要按一下按钮.4s后红灯灭,绿灯亮,过5s秒后,绿灯闪烁4次然后红灯又亮-Consider zebra stripes control of traffic lights, with red, green two lights, usually red bright side of the road with button SF, pedestrians crossing the street ne