Here’s Chicago’s, whose grid pattern is hypnotizing:
Here’s New York’s, which just looks like a mess (a highly efficient mess, I might add):
All of the videos (of Los Angeles, San Francisco, Boston, Manchester, Austin, Montréal, Washington, D.C., Auckland, Seattle, and Vancouver) can be watched here. They’re pretty interesting, especially if you know a city’s geography. The patterns of movement are easily seen (in Chicago, for example, you can find the CBD easily; in New York’s, you can easily find Manhattan but the differences between Queens and Brooklyn are less distinct).