BBC六分钟英语｜如何与无人驾驶汽车共享道路？
英音听力｜BBC & 经济学人等
Sharing the road with driverless cars
Phil
Hello, this is 6 Minute English from BBC Learning English. I'm Phil.
Pippa
And I'm Pippa.
Phil
Here at 6 Minute English, we love discussing new tech. One of the most controversial technologies of recent years is driverless cars, also known as self-driving cars, autonomous cars or robotaxis.
Pippa
Many people say they wouldn't feel safe in a car without a human driver, but there are concerns from other road users too – pedestrians, runners and cyclists. How will driverless cars interact with them? It's a problem Professor Stephen Brewster, from Glasgow University, has been working on. He explained more to BBC World Service programme Tech Life.
Stephen Brewster
If you're outside a vehicle right now, you can see the driver inside the vehicle, you can wave to them, they can see you, you can make eye contact. But when you come to an autonomous vehicle, there's no person in the driving seat, so how do you negotiate whether they're going to go, whether they're going to let you go?
Phil
On my walk to work, I need to cross the road. Usually, a driver makes eye contact with me. They look directly into my eyes and then wave me across. To wave means to raise your hand and move it from side to side. It's a gesture for saying hello, or a way of telling a person to do something.
Pippa
Luckily, Phil, you usually arrive safely at work and as yet there are no driverless cars in London. But, Phil, how would you feel about crossing that road in front of a robotaxi?
Phil
Well, maybe a little bit nervous. I might wait for it to go and go behind it or something.
Pippa
Mmm... yeah, I get that. I think maybe as we get more used to these technologies, we'll get more used to how to deal with them and when to cross. But in this episode, we investigate the tech helping driverless cars communicate on the roads. We'll learn some useful new words and phrases, and as usual you'll find all the vocabulary on our website, bbclearningenglish.com.
Phil
But first, I have a question for you, Pippa. As you mentioned, we don't have self-driving cars here in London yet. So, which was the first city to have fully driverless robotaxis on the streets? Was it: a) Philadelphia, b) Phoenix, or c) San Francisco?
Pippa
I'm going to say b) Phoenix because I think it's quite a car-friendly city.
Phil
OK. Well, we will find out the answer, but at the end of the programme. Because accidents are often caused by not seeing the oncoming danger, Professor Brewster wants to make driverless cars more visible. He discussed his work with BBC Tech Life's presenter Chris Vallance.
Chris Vallance
What kind of signals worked in terms of alerting pedestrians and runners and cyclists to the intentions of the vehicle?
Stephen Brewster
We tested two things. We tested animations and fixed, coloured light rings. The animations – they work well for pedestrians, but when it came to runners and cyclists, they have much less time to make their decisions, so if you do a quick glance at a vehicle, you don't really see the animation.
Pippa
It's important to alert people to driverless cars. To alert somebody means to warn them about a potential danger. Some cars do this with animations – displays of moving images. For example, a green man walking to signal it's safe to cross.
Phil
Animations alert pedestrians but are not suitable for runners and cyclists, who are travelling too fast to react. They only have time for a glance. A glance at something means a quick look. So, instead Stephen's team used coloured light rings, similar to traffic lights, to warn cyclists and runners.
Pippa
Culture is another problem. The meaning of body language can change. For example, hand waving can mean 'please proceed' in one culture, but 'thank you' in another.
Phil
Ammar Al-Taie is a researcher at the Advanced Institute of Science and Technology in South Korea. Here, Ammar tells BBC World Service's Tech Life why Korean culture is especially suited to self-driving cars.
Ammar Al-Taie
In South Korea, for example, jaywalking is illegal, whereas in the UK, you know, we tend to jaywalk a lot.
Pippa
Jaywalking is an American English word. It means crossing the road at a place where crossing is not allowed or without taking care. Unlike Britain, jaywalking is rare in South Korea, making the country safer for autonomous cars.
Phil
We've heard a lot about making driverless cars safer, and with plans to introduce them to London later this year, we'll soon see how safe they really are.
Pippa
Now, isn't it time to reveal the answer to your question, Phil?
Phil
I asked you which city was the first to have self-driving cars on the road, and you said it was Phoenix... and that is the correct answer. Phoenix, Arizona, was the first city in the world to have self-driving cars operating on public roads without a human safety driver, and that was in 2017. Let's recap the vocabulary we've learned, starting with eye contact – looking directly into someone's eyes.
Pippa
To wave at someone is a way of saying hi, by raising your hand and waving it from side to side.
Phil
If you alert someone, you warn them of potential danger.
Pippa
An animation is a display made up of moving images.
Phil
A glance is a quick, brief look at something.
Pippa
And finally, the American English term jaywalking means crossing the road where you're not supposed to.
词汇表
make eye contact 进行眼神交流
wave at someone 向某人挥手（打招呼或示意）
alert [əˈlɜːt] vt. 提醒，警告（注意危险）
animation [ˌænɪˈmeɪʃn] n. 动画，动态图像
glance [ɡlɑːns] n./vi. 一瞥，快速看一眼
jaywalking [ˈdʒeɪwɔːkɪŋ] n. 乱穿马路（不遵守交通规则横穿街道）
driverless car [ˈdraɪvələs] 无人驾驶汽车
self-driving car [ˌself ˈdraɪvɪŋ] 自动驾驶汽车
autonomous car [ɔːˈtɒnəməs] 自主驾驶汽车
robotaxi [ˈrəʊbəʊtæksi] n. 机器人出租车
pedestrian [pəˈdestriən] n. 行人，步行者
cyclist [ˈsaɪklɪst] n. 骑行者，骑自行车的人
visible [ˈvɪzəbl] adj. 可见的，显眼的
light rings 光环，光带，灯环
please proceed [prəˈsiːd] 请继续，请前行
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