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Some day, our world may {#blank#}1{#/blank#} (fill) with driverless cars. But.{#blank#}2{#/blank#}will we communicate with them if there's nobody in the driver's seat?
At present, drivers can make gestures like{#blank#}3{#/blank#} (nod) when they let us cross the street.{#blank#}4{#/blank#} self-driving cars don't have this ability.
The US car maker Ford and its partner Virginia Tech {#blank#}5{#/blank#} (try) to solve this problem. The team is testing a method {#blank#}6{#/blank#}uses light signals. For example, a slow-blinking tight shows the car is coming to {#blank#}7{#/blank#}stop, and a rapidly flashing light tells passers-by that the car is about to speed up.
{#blank#}8{#/blank#} (test) the method on real roads, the team has designed a special suit that looks like a car scat. When a driver wears it, it appears as if the car were driverless.
The team has {#blank#}9{#/blank#} (successful) collected more than 1,500 hours of data, which has recorded how people interacted with a “driverless” car. Ford says it plans to share the data {#blank#}10{#/blank#} 11 other car makers, which should lead to a signaling system that will be used in every driverless car.