Simple website, with the google API, where you tell me in which part of the map, specifically streets of cities there are more people (walking, car, collective, (must be discriminated)).
At what time are they there?
How long they stay in that place
What days are the busiest.
If you can, segment ages and sex.
Save data in database.
Show the most "hot" locations (where there are more people, where more people stay, that is, the most visited places with the most permanence)