From the DH rules (p5):
"The Phrase 'In Arkham' on Cards: Cards that refer to "Arkham" also apply to areas and locations in Dunwich. So for example an Environment card that adds +1 to Fight checks and subtracts -1 from Will checks in Arkham also affects investigators who are in a Dunwich street area or location."
I think it's clear the taxis also go from/to Dunwich, when that board is in play.
from the get-go, so I'm guessing he's looking to keep Yibb's combat modifier as low as possible, Newspaper Reports let's you grab a Clue from anywhere, instead of going there.