Question (4) seen, 20 vehicles/km moving at 100 km/h and 30 vehicles/km traveling at 120 km/h. Two successive videos showing stationary traffic on the road were examined. Two groups of platoons were (a) Assuming vehicles can sustain their velocities while overtaking others, how many vehicles will a driver going at 120 km/h overtake within one kilometer? (b) How many overtaking maneuvers are performed by all drivers on a one-kilometer segment of the road/ within one hour?