Progress: the Katy Freeway in Houston, Texas, spans across 26 lanes making it the worlds widest. The freeway is broken down in to 12 main lanes (six in each direction), eight feeder lanes.
Cities don't inherently create this much private traffic. Car centric city planning does. You can build cities that are not centered around cars. It is, in fact, easier to plan for fewer cars per person if everyone lives close together, because the places you need to go will be closer and you can bike or walk, and there's enough people for public transport to go frequently and everywhere without being half empty.