If the cars were able to push and pull each other, engines/batteries could be used optimally. Cars with nearly empty batteries would recuperate and recharge if absolutely needed, cars with full batteries would pull the rest. AP would put the most suitable car in front to minimize the total air resistance... Lots of possibilities.
Might be worth designing a new type of car for this kind of use though.
Might be worth designing a new type of car for this kind of use though.