I saw these screenshots posted this evening and I can't believe the game's AI would allow for this to happen. This traffic pattern allows traffic to flow properly and there are no traffic jams! Basically, you create a city with no intersections! :O And it works too! What the heck!?!?
Yup. The problem with intersections seems to be sims just keep driving around in circles and doing u-turns. Hopefully they fix the traffic AI soon (as well as buses and emergency vehicles).