Do you want to see how traffic efficiency can be decreased by 17% using shapes? Fasten up.
Figure 1 - In a constant space 6 cars can travel a constant speed.
Figure 2 - Changing lanes decreases surface efficiency by 17%, trailing cars must decrease speed to create space.
Perpetual lane changers exacerbate the decline in traffic efficiency as constant speed, and space optimization can never successfully occur. Worse yet, as they proceed ahead the results compound. To ye I say: Please stop being a dick.