all rental companies used that garage just outside ZTL

It is very easy to approach from the South of Florence.  You will completely avoid ZTL once you study well the map.   I do not know about from the North.

我们在罗马港口 pick up our Budget rental，然后在佛罗伦萨归还。我们在托斯卡纳度过了 7 天，其中在锡耶纳北部边缘 Four Points hotel 停留了 5 天，作为游览周边地区的基地。这个位置非常好，因为当您出去游览托斯卡纳时，您完全可以避开锡耶纳内的交通拥堵, plus avoiding ZTL.  Four Points is a modern hotel under Marriott banner.  Excellent breakfast for every guest when we stayed in Spring of 2023.  Drawback is there is no restaurant around except a pizza joint albeit a very good pizza joint.

要游览锡耶纳和几个山城，您可以将车停在城镇山脚下，那里通常有大型公共停车场。 然后，坐缆车上城镇所在的山顶。 奥维耶多和锡耶纳都是这样运作的。阿西西 has a 5 levels garage set inside the hill.  After you park, you take a long funicular to the hill top.