請問地鐵的pass - 波士頓

我在 http://www.mbta.com/ 上面看到兩種weekly pass

一種是

Weekly Passes
The Weekly Combo Pass costs $16.50. It is valid from Sunday to Saturday
and allows customers to use subways and buses as they can do with a
monthly Combo Pass.

Weekly Combo $16.50
Weekly Combo Plus $18.50

另外一種是

Visitor Passports
1-Day Visitor Passport $7.50
3-Day Visitor Passport $18.00
7-Day Visitor Passport $35.00

網站上說
The Boston Visitor Pass is valid for unlimited travel on the subway, local
bus and inner harbor ferry.
如果我在週日買票的話不就跟Weekly Combo一樣都是從禮拜天用到禮拜六
這樣跟Weekly Combo的差別是在可不可搭船嗎 @@?
還是有其他不一樣的地方呢??

另外, 請教monthly pass的問題
是說月初前幾天都可以買然後用到月底嗎？
還是說可以用30天之類的?
網站上說Red line有幾個站不適用
那如果搭到這幾個站的話是出站的時候補現金1.25?還是補token呢?


謝謝 ^^""



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