利用枕木流动的速度感来估计列车运行速度已是司机的习惯做法。在列车低速运行时 ,这种速度感比从速度表上读数更具直接性。但正如人们长时间看到快速移动的物体会感到眼睛疲惫一样 ,在高速列车上司机长时间注视快速流动的枕木会引起视觉上的疲劳或眩晕。怎样评估司机的速度感及采取何种措施防止产生视觉疲劳是文章讨论的重点 It is customary for a driver to estimate the speed of a train using the speed of the sleepers. This speed sense is more straightforward than reading on the speedometer while the train is running at low speed. However, just as people can feel tired eyes for a long time when they see fast-moving objects, it may cause visual fatigue or dizziness for drivers who watch fast moving sleepers for a long time on a high-speed train. How to assess the driver’s speed and what measures to take to prevent visual fatigue is the focus of the article discussion