Orvieto, take the Finiculare and bus.

The Duomo Orvieto

If you plan on visiting Orvieto, that incredible hilltop town, and you are arriving by car, plan ahead. Like many town in Italy, traffic is restricted.  The “zona limitato” means you are subject to a multi or fine. Traffic cameras are present throughout Italy. I can attest to their effectiveness. Orvieto maintains a public parking lot at the bottom of the hill where you can take the funicular to the top and catch a bus for the short tine into the centro. Tickets are 1.30 Euro one way and good for 90 minutes. 

Here is a link to the short video of the ride and bus trip.

There is a parking area at the base of the funiculare.  Look for spaces that indicate parking is allowed and there is no charge.