I have some random thoughts:

a) where the heck is everyone going anyway? Can people simplify their lives by efficiently picking routes - and getting them all done in a chain?

b) If autonomous cars are the future, they eventually get some say in how to efficiently structure roads, right? So, will some AI one day figure out that the greater "hive" will all benefit if every car only makes right-hand turns? And do left hand turns just become illegal?