And all three streets are downtown

At a bus station

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Boy: Downtown.
T.S: Downtown. That's not very far.
Boy: Isn't it? Can I walk there?
T.S: No, it's too far to go on foot.
Boy: Then how do I get downtown?
T.S: That depends.
Boy: Depends on what?
T.S: Depends on whether you want to take the bus or the subway.
Boy: I want to take the bus.
T.S: There are three bus routes that go downtown, 7A, 7B, and 7C.
Boy: 7A, 7B, 7C. I got it.
T.S: 7A starts on King Street, goes into Main street. 7B goes along
King Street but turns right on the Rosehill Avenue.
7C goes along King Street but turns left on the Park Road.
Boy: And all three streets are downtown.
T.S: Yes. Which one would you like to take?

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What does "all three streets are downtown" mean?

Does it mean "all three streets lead to downtown" or

something else?

Thank you