A fourth color might be added to traffic lights to better realize the potential of self-driving vehicles
为了充分发挥自动驾驶车辆的潜力，交通信号灯可能会增加第四种颜色，
as stated in a recent paper by
researchers at North Caroina State University in the US.
美国北卡罗来纳州立大学的研究人员在近期的一篇论文中提出。
Autonomous vehicles can do more than just drive - they are able to sense their surroundings and upload information.
自动驾驶车辆不仅能行驶，还能感知周围环境并上传信息。
A shared network gives orders to stop at a crossing based on traffic conditions.
The added white lights would be used to signal to human drivers that autonomous venicles are managing the upcoming traffic flow intelligently.
新增的白灯会向人类驾驶员发出信号，表明自动加购车辆下车知能成对明本的车流动笃驶牛物止仕智能应对即将到米的车流。
Drivers don't have to check the traditional lights if the white one is on.
如果白灯亮起，驾驶员就不必去确认传统的交通信号灯。
"The white lights will tell human drivers to simply follow the car in front of them,"
“白灯会告诉人类驾驶员，只要跟着前面的车走就行了。"
one of the study authors Ali Hajbabaie told the universitys website.
Simulated models showed that
autonomous vehicles were able to improve traffic flow on their own.
模拟模型表明，自动驾驶车辆能够自行改善交通状况，
Introducing the white light also has a positive effect on reducing fuel consumption.
增设白灯对降低油耗也起积极作用。
The higher the percentage of autonomous vehicles at a crossing the faster the traffic moves.
在十字路口处，自动驾驶车辆所占的比例越高，车辆移动速度就越快，
reducing about 40 to 99 percent of the total delay time.
可以减少约40%到99%的总拥堵时间。
What kind of infrastructureis needed as self-driving technology thrives?
自动驾驶技术蓬勃发展，需要什么样的配套基础设施呢?
In an interview with China Surveying and Mapping magazine Liu Jingnan at the Chinese Academy of Engineering shared his answers.
中国工程院院士刘经南在接受《中国测绘》期刊采访时给出了答案。
To begin withthe yehicle's network that collects data about the environment and shares the data with other vehicles needs to be intelligent.
High-precision maps are needed for autonomous vehicles to plan routes in detail.
自动驾驶车辆还需要高精地图来详细规划路线，
They can provide both updated information on traditional maps and real-time changes such as accidents.
这种地图既可以提供传统地图的最新信息，也可以提示诸如发生事故等路况的实时变化。
For example when driving around a curve the navigation systemin the vehicle needs to calculate the safe speed based on the maps information.
例如，车辆行驶在一个弯道上时，导航系统需要根据高精地图提供的信息，计算安全车速。
And if the area is fog ,the network has to alarm the other cars to slow down.
如果在通过这个弯道时恰好有雾，车联网必须提醒其他车辆减速。
Other elements on the road need to be upgraded too.
道路上的其他设施也需要升级。
For example road markings should be precise and readable for machines.
例如，交通标识应该保持精确，可供机器识别。
Sensors should be built on sidewalks and roads to allow vehicles to predict potentially dangerous situations.
人行道和马路上还应该安装传感器，让车辆能够预测潜在的危险情况
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