STEM与日常科技·英语30篇（9）
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Why Traffic Lights Change Faster When Buses Arrive
公交车到达时红绿灯为何会加快切换
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City traffic lights use GPS signals from buses to adjust timing in real time.城市交通信号灯利用公交车的GPS信号实时调整配时。
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When a bus approaches within 200 meters, the light extends green by up to 15 seconds.当公交车驶入200米范围内时，绿灯最多延长15秒。
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This system reduces delays and helps buses stay on schedule every day.该系统减少延误，助力公交车每日准点运行。
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Drivers see a small 'BUS' icon flash above the light when priority is active.公交优先启用时，司机可见信号灯上方闪烁‘BUS’图标。
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The same tech works for emergency vehicles like ambulances and fire trucks.相同技术也适用于救护车、消防车等应急车辆。
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No special hardware is needed — all city buses broadcast location automatically.无需额外硬件——所有市内公交车自动广播位置信息。
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Pedestrian crossing signals pause briefly to let the bus pass safely.行人过街信号灯会短暂暂停，确保公交车安全通过。
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You’ll notice smoother traffic flow on main roads during rush hour.高峰时段，主干道车流更顺畅，您将明显感受到。
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Engineers test new timing patterns monthly using real traffic data.工程师每月利用真实交通数据测试新的配时方案。
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Cyclists benefit too because bus priority reduces sudden stops and starts.骑行者同样受益，因为公交优先减少了急停急启。