Minimum time headway model by using safety space headway

In order to build on the minimum time headway model between vehicles, paper used the model of safety space headway and the relationship between space headway and time headway. And get the three elements of the minimum time headway. The three elements are reaction time, braking coefficient and vehicle safety length. Then obtain the diagram of the minimum time headway and the three elements. Finally, by using the measured data, the minimum time headway model is match the measured data.