【摘要】 介绍了电灯的由来,探讨了黄灯时间的长短对交通安全正负两方面的影,在应用力学和运动学原理的基础上,提出了一种计算黄灯时间的模型.分析了模型建立的全部过程,最后列出了黄灯时间的求解公式.更多还原

【Abstract】 A traffic light is an information-showing device,which is often seen in traffic control system.This paper introduces the source of yellow light,and also discuss the effection with time of yellow light.At last,the author presents a model to solve the time of yellow light.更多还原