So new traffic signals emerged in various forms.

因此新信号灯以各种形式出现。

These three buttons look like traffic signals, don't they?

这三个按钮看起来像信号，不是吗？

A green light on a traffic signal means your car can continue on.

信号灯亮绿灯表示你车可以继续行驶。

But often they just pass by, taking the human traffic signal for granted.

司机常会驶过，把人体标志做所然。

By 1922 many traffic signals were being automated on timers.

到1922年，许多信号灯有了倒计时。

So officials have created what they say is the first traffic signal for, you get it, camels.

所以官员们创造了所谓第一个为骆驼建造信号灯。

Lester Wire, a policeman in Salt Lake City, Utah created the electric form of the traffic signal.

在犹他州盐湖城，一位名叫莱斯特警察发明了使用电力红绿灯。

A traffic signal is not efficient at all.

信号根本没有效率。

Well, think about how a traffic signal manages traffic.

好吧，想想信号如何管。

C. Flexible timing of traffic signals.

C. 信号灵活配时。

In 1923 Morgan patented a three-way traffic signal that offered stop, go, and all-stop options.

1923 年，摩根获得了三向信号灯专利，该信号灯提供停止、行驶和全停选项。

Especially when you compare a roundabout to an intersection with traffic signals.

尤其是您将环岛与有信号十字路口进行比较时。

So another way you'll know when to stop is when you see a stoplight or a traffic signal.

因此，您知道何时停止另一种方式是您看到红绿灯或信号灯时。

On December 9th, 1868, the world's first traffic signal was installed near Westminster Bridge at the corners of Great George and Brige streets.

1868年12月9日，首个信号灯安装在了威斯敏斯特大桥附近，位于乔治街和布里奇街拐角处。

But usually a traffic signal would be at an intersection, where two streets cross.

但常信号灯会在十字路口，两条街道叉地方。

This, of course, was usually on corners or intersections where there was no traffic signal, no electronic signal to stop cars.

然， 这常是在没有信号拐角处或十字路口，没有电子信号可以停车。

The examiner had me drive around the block, checking to see that I stopped at the stop signs and traffic signals.

考官让我绕着街区开车，检查我是否停在了停车标志和信号灯处。

The Federal Highway Administration, they estimate that traffic signals account for about 295 million vehicle hours of traffic delays per year.

美国联邦公路管局估计，信号灯每年造成约 2.95 亿车小时延误。

Although traffic signals had been in use for some time, most were simple devices that directed traffic to either stop or go.

尽管信号灯已经使用了一段时间，但大多数都是引导停止或行驶简单设备。

That could be in the middle of a long block, and that might also have a traffic signal in some places.

那可能在一个长街区中间，并且在某些地方也可能有信号。