The Weber-Fechner Law,which says that the relationship between applied stimulus level to human and the level of human sensation can be expressed mathematically by the exponential equation. The measured data of speed and distance-headway have proved the Weber-Fechner Law, from which very new evidences were presented. This book will mention the followings: First one is that the analyses in time-domain were made possible, and opened the door to know the time sequential change of flow by measuring each car speed and time-headway. Second one is the essence was presented of the...