The SITA bus station is just a couple of hundred meters from the Santa Maria Novella train station in Florence (the main station), where you can check schedules and buy tickets. They have a website, but it is not working at the moment so I am not going to frustrate you by posting the broken link (they seemed to have changed their domain name and have some big mess going on - we will update this page when the situation changes). SITA buses run inter-city routes mostly to the south (think Chianti) and east of Florence - if you want to head to Siena and other towns on the way, then SITA is probably a good choice. They also have some tourist itineraries (like a visit to "The Mall"). Image below courtesy of Google Maps. Address: Via Santa Caterina da Siena, 17. Phone: 055 219 383
Here is a update - you can find the PDF schedule for the SITA bus lines here. For Florence to Siena you want (preferably, since it is the fastest) the CORSE RAPIDE / EXPRESS SERVICE.
Just an update since a lot of people seem to be finding this page - the construction of the new tram line is currently ongoing (summer 2009) and it can be a little more difficult to cross the street than is shown above!
Posted by: Anthony | August 25, 2009 at 02:57 PM
Current SITA website for their Tuscany lines, Italian only: http://www.sitabus.it/wps/portal/DovePartire_Toscana
Posted by: Anthony | August 25, 2009 at 03:01 PM
Current SITA schedule for some of the routes (Siena, etc) bi lingual.
http://www.sitabus.it/sita-toscana/Firenze%20-%20Siena.pdf
Posted by: Mark Asmundson | February 23, 2010 at 05:27 AM
Thanks Mark - I do have that link in the article above!
Posted by: Anthony | February 23, 2010 at 09:58 AM