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police had to steer traffic.
Police officers giving traffic signals.
Stop signs
There would be traffic circles everywhere! I believe traffic would actually move a little faster during rush our with this. The east coast is full of traffic circles.
use lights on cars
They are called "roundabouts".
In the US, we call them "Traffic Circles".
The traffic light as we know it today was invented by Garrett Augustus Morgan, the son of former slaves. Before that there was a gas lantern signal light in England, but that was before automobiles. There was a railroad light version later, but it wasn't like our modern version. If you didn't mean "traffic light" then i don't know.
The very first traffic light was a revolving gas lantern with red and green lights installed in a London intersection in 1868, before the advent of automobiles. A later version of the traffic light based on railroad signals was installed in Detroit, Michigan, in 1920.
i dont know if u know plz tell me
The opposite would be "light traffic".
If a traffic light breaks most cities will assign a traffic cop to regulate traffic until the light can be fixed.