Truckers: There will be "smart" lanes that enable computer-driven vehicles to travel bumpertobumper at high speeds.
卡车司机：将会有可供电脑驾驶的机动车一辆接一辆高速行驶的“智能”车道出现。
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The younger volunteers also didn't seem to be affected when the scientists sped up the time at which the cars approached the intersection by shortening the bumper-to-bumper distance between cars.