Weber-Fechner Law in road traffic flow

Weber-Fechner Law was verified in between distance-headway (f) and car speed (y). Nobody has ever noticed this fact, since the traditional idea in analyses of road traffic flow has neglected the viewpoint of driver´s human factor. The present paper will show the Law existence by measurements of T(time-headway) and V for each pair of cars subsequently flowing on road (X = VT). All graphical relationships between measured values of X and V showed the formula of X = X₀ e^ßv with very high correlation factor that nearly equal to 1, which can definitely be said it obeys the Law.