Model the Highway Traffic (?) One-lane Rules
At a certain time step t, update all vehicles in parallel according to the rules below:
For vehicle i, v(i) is the velocity, x(i) is the position, gap(i) is the number of empty sites ahead (forward gap)
IF v(i)<Vmax THEN v(i)++ ;
IF v(i)>gap(i) THEN v(i)=gap(i) ;
IF v(i)ɬ AND random( )<pd(i) THEN v(i)-- ;