The parking area at Voiterra is at the base of a tall hill (or small mountain). There are fine walkways that lead up to the town which in ancient days was more populated. The climb will take at least 15 minutes. From the bottom you can see parts of the ancient town walls. At least from here you have nice views of the country side.
It's not uncommon for people who live in relatively flat places, or in places with multi-lane highways, to imagine that they know how long it will take to get from Point A to Point B. So hearing that Volterra is 60 km away from Florence might lead such folks to conclude that they might easily arrive a mere hour or so after departure. Setting aside the likelihood of taking a wrong turning in the notoriously poorly-signed rotaries and intersections, there simply is no way to make the drive so quickly. Two-lane roads which wind and twist -- even discounting the glorious landscape which practically requires one to slow down and enjoy the vistas -- are not designed for speedy transportation. I'd allow two hours.
So when you read that San Gimigiano is only 16 km away...better pack a lunch!
Parking can be limited during the tourist season. When we were there, even in October, not many spaces were available. Some park along the road, but be careful so no tickets are issued. The main entry is through Porto della Arco on the south side. Most parking is on the north side by the Teatro Romano, but then you have to figure out how to manuveur into the main Piazza Priori. I belive there is also a charge to park.WE backtracked the town twice and found a good spot to park along Viale del Ponti.
You can walk up through the archiological park if a spot is found on the south side.
Italy has a reputation for crazy drivers, particularly in places like Rome and Naples. As we were not visiting any big cities we decided to brave driving in Italy, and I am pleased to say it all went without a hitch. Though, I must admit that driving in the teaming rain on the truck-infested autostrada wasn't my idea of fun....however being able to really get off the beaten track in Tuscany was so worth it!
The drive to Volterra involves lots of winding roads....you may want to take a tablet if you get travel sick like I do :-/
Cars are not really allowed to drive through the centre of town, so even if your hotel is located within the city gates you will have to park outside the walls and walk.
We stayed two nights in Volterra. Our hotel was located just outside the city walls and had free parking which was fabulous. I really hate having to find parking, so this was one of the things that attracted me to the hotel when booking.
If you are not driving to Volterra, you can catch a bus from Colle di Val d'Elsa, which takes about 50 mins. For buses from/to Siena, Florence and San Gimignano you will also have to change at Colle di Val d'Elsa. The bus terminal in Volterra is on Piazza Martiri della Liberta.
You can also catch a bus from/to Saline train station (20 mins), which has connections to main Italian cities/towns.
The way up the 550 meter high hill will take a while cause there are a lot of serpentines and a lot of slow cars that you can´t overtake really.......Enjoy the landscape........
In Volterra they expect loads of tourists everyday and there is a huge park house under the city........it costs a few €uros but it´s very central........