Pompei Bike again ...

Sarah already posted about the Pompei Bike initiative, but I just found the map of the bike routes on-line. And now I'm wondering how this actually works - for example, are the houses on the map really open (and to all tourists?), and are the pavements divided for bikes and pedestrians or do the bikes have to be left at the different numbered points on the map? Anyone out there care to shed some light for me?!

Here's a English article about the initiative on ANSA.