Everyone - thanks for the kind words!
jakev - The long exposure light trails were just that - I went out one night with my DSLR and took over 300 4-second exposure shots of passing cars. It was tricky to find a spot that was dark enough but had a lot of traffic. I sequenced them together in After Effects and mapped them on to deformed planes in EIAS. I shot all the background time-lapse plates too so I knew how to set up the cameras in EIAS to match. When I composited the renders back in After Effects, I had to adjust the gamma with the levels plug-in and add a glow filter.