STEM与日常科技·英语30篇（9）

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公交站台为何用大字体闪烁显示实时到站时间

Digital bus stop signs pull live location data from GPS units inside each approaching vehicle.
They update arrival estimates every fifteen seconds and flash the minutes remaining in bold, easy-to-read fonts.
Even in bright sunlight or heavy rain, high-contrast LED panels stay clearly visible from ten meters away.
A soft chime sounds once when the bus is two stops away, helping riders prepare without staring at the sign.
Some cities add icons showing wheelchair access or bike rack availability beside the time display.
The system works offline for up to thirty minutes if cellular signal drops briefly near tunnels or bridges.
Elderly passengers especially appreciate knowing exactly when to step forward without guessing or waiting too long.
Signs reset smoothly after each bus departs, then show the next scheduled arrival within seconds.
No app download is needed — information is public, free, and available to everyone passing by.
Commuters say this small upgrade makes daily travel feel more predictable and less stressful.