I'm sorry guys, I just cannot figure out this bus time table. I'm looking for bus times for a Friday early to mid morning. If anyone can help out that'd be great - thanks.
I can't help with this but I went down to the bus station a day in advance and read the posters with the times on it.
Just know that buses run frequently between Florence and Siena. If you miss one, another will be available in an hour or so. Plan on around 8:45 - 9 am or so. No need to worry here.
I poked around a bit, I am not certain how up to date this PDF is as it was from 2014, but, I am thinking, the schedules are not likely to change that much. This is for an express bus. Absolutely, the best way to proceed is to use this as a guide and get the current schedule the day before at the bus station. With your back to the S.M.N train station the bus station is on your right. You will see a TIM store as a land mark. Walk up and around the corner and the BuSITAlia is right there just off of the Piazza della Stazione on Via Santa Caterina da Siena.
You would be departing from Firenze - Autostazione.
If you look out the side door of the Florence train station, you'll see a McDonald's restaurant.
The buses line up around the corner to the right--and on the block behind McDonalds.
They leave so often that you don't really have to worry about schedules,, etc.
Doc,
This may help http://www.busfox.com/timetable/
Doc,
This may be what you're looking for - http://www.tiemmespa.it/var/ezdemo_site/storage/original/application/a9cb26924cf7edbe74c346d41aee586e.pdf
It should be reasonably current, and will provide you with an idea on the times for the Corse Rapide Buses. In any case, there are numerous Buses each day, so you'll have lots of choices on departure times. As I recall, the "Autostazione" is just down the road from Firenze SMN. This map will provide an idea - http://www.florence-journal.com/trains-buses-cars-airports/sita-bus-statio.html
DON'T forget to validate your ticket or you'll risk hefty fines! I can't remember at that location if the validation machine is on the platform or on the Bus.