Symbol  Definition  Units 
 The average velocity of mixed traffic flow  mile/hour 
 The vehicle by the total distance of a road  mile 
 Some sections of the vehicle by the total time  hour 
 The safe distance from driving  mile 
 The length of selfdriving, cooperating cars  mile 
 The proportion of selfdriving, cooperating cars  mile 
 Through a section of distance  mile 
 Through a road the total time of driving cars  hour 
 Through a road the total time of selfdriving cars  hour 
 Under the influence of the driving cars, the selfdrive delay time  hour 
 The proportion of selfdriving 

 A road traffic flow  hour 
 Some sections of the vehicle density 

 A road block coefficient 

 The average speed of driving cars  mile/hour 
 The average speed of selfdriving cars  mile/hour 
 The average speed of zero flow  mile/hour 