是东西方向准行，东西方向绿灯亮，南北方向红灯亮。经过一段时间后，东西方向黄灯，南北方向红灯亮，再经过一段时间，是南北方向准行，南北方向绿灯亮，东西方向红灯亮-Is a quasi-line east-west direction, east-west green light, red light north-south direction. Over time, the east-west yellow light, red light north-south direction, and then after a period of time, is a quasi-line north-south direction, north-south direction of the green light, red light east-west direction