Sony Online Entertainment just posted a video on the DC Universe Online Facebook page that features Game Director Chris Cao discussing how traffic will play a major role in the upcoming comic book MMO:

"Traffic? It's a plaything. It's something to mess with as a villain, to create mayhem, to cause it to go wrong. ... And as a hero, of course, it's up to you to contain and then to fix that kind of damage. ... While it might seem like a small thing, it's a big thing in DCUO."

Sadly, the video doesn't contain any gameplay footage of traffic in action, but it is good to see an update from the DCUO team.