Traffic Lights Could Have a 4th Color in the Future红绿灯未来可能会有第四种颜色

David Nield张紫轩

In the future where autonomous2 cars move on the busy roads，traffic lights might have a fourth color. It is used for the self-drivingcars. Researchers at North Carolina State University are proposing3 awhite traffic light. It would tell the drivers of autonomous cars whatto do. The thinking is that the traffic will go better and cars will useless oil.

The cars that are driving themselves wont need to“look”at thewhite traffic light， because theyll be“talking”with it wirelessly4.The white traffic light tells drivers and passengers5 that they shouldfollow the self-driving cars in front when going across the crossings.

Red lights still means stop. Green lights still means go. Yellow lightsstill means slow down. And white lights will tell the drivers to follow the carin front of them. Stop if it stops， go on if it goes on.

未來，当自动驾驶汽车在繁忙的道路上行驶时，红绿灯可能会出现第四种颜色。它专为自动驾驶汽车而设。北卡罗来纳州立大学的研究人员提出设置白色红绿灯的建议，白灯可以告诉自动驾驶汽车的司机该怎么做。

他们的考虑是交通会更顺畅，汽车会用更少的汽油。

自动驾驶的汽车不需要“看”白色红绿灯，因为它们会通过无线方式与之“交谈”。白色红绿灯告诉司机和行人，他们过十字路口时，应该跟随前面自动驾驶的汽车。

红灯仍然意味着停止，绿灯仍然意味着出发，黄灯仍然意味着减速。白灯则告诉司机，跟着他们前面的那辆车，它停你就停，它继续开你就继续开。

Notes

1. future.未来；将来

2. autonomous.自动的

3. propose . 提议；建议；提出

4. wirelessly.无线地

5. passenger.旅客；乘客；过路人