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 need to click the button .4 s red light off, the green light,5s seconds after the green light flashes 4 times and then the red light and bright