At a much higher resolution, the alien eventually finds that:
...the crisscrossing straight lines within the cities are filled with streamlined, multi-coloured beings a few meters in length, politely running one behind the other in orderly procession. They are very patient. One stream of beings stops so that another stream can continue at right angles...at night they turn on two bright lights in front so they can see where they are going. Some, a privileged few, go into little houses when their workday is done and retire for the night. Most are homeless and sleep on the street.Naturally, the alien visitor assumes that these polite, multi-coloured beings (which we, the human reader, immediately recognise as road vehicles) are the planet's dominant life forms. (At a stronger resolution yet, the alien observes “tiny parasites that occasionally enter and exit the dominant organisms”, but it doesn’t think of them as particularly important!)
Pale Blue Dot is full of many such moments that make you think about aspects of our world and what an outsider might make of them - like the best works in its genre, it forces you to step outside your own skin for a while. But reading the passage above, it also strikes me that if Sagan’s alien were to home in on a busy Delhi road during rush hour, all its notions about “patient” life forms would quickly evaporate. Instead, it would witness the sort of anarchy that would make it difficult to understand how life on this planet could ever survive for any length of time. In that sense, Delhi traffic is probably more representative of the general human condition than the “orderly processions” on the roads of other major cities are. And that's before all the waterlogging began.
[Related posts: new ways of looking at the world, Clarke's short stories, Climbing Mount Improbable]