we want to show that in a big city like Palermo, cycling can be the fastest tool (and at the same time the most ecological). We will give 4 smartphones to 4 users, and there will be 4 ways to move: by bicycle, by public transport, by foot and by car. We would like to use some smartphone apps to show in real-time in a webpage, in a single map, the route of each user. I know I can use something like Google Latitude or Glympse to track in real-time user position, but I do not know how to put in a single map 4 real-time different routes.
Our goal is to promote the use of bicycle, because we have a high air and noise pollution and the motor vehicle traffic makes mobility very problematic. We will do it voluntarily without any economic budget, then we are looking for some simple mush-up solution that does not force us to produce several hours of development. Something almost ready for "production".
Do you know some solution?