Passing by Old Main

I really want to go with my first idea. I like the idea of seeing how many people pass by one building and am curious to see how many times I will see the same people and how often I see them. I am going to have to spend more time there than I had originally thought but I think it is still possible to get a good amount of usable pictures. One suggestion that I would like to explore is the possibility to take a still image of a person and then a long exposure shot to show how they move and how they think about their movements. However I am not sure how this will blend in with what I am imagining. I also think I like the idea of different times of day. I had originally thought that I would take my photos at approximately the same time of day but I am now wondering what the activity is like in front of this building at different times of day.