Oh NY is like that too, locals always call the avenue --6th Avenue, (its been avenue of the americas of 30 odd years or more) and we take the 59th Street brigde (not The Queensboro bridge)

125th Street is still the main drag of harlem, no matter that its offical name is Martin Luther King Blvd.

and don't even get started on the subways! old timers like me know the BMT, the IRT and IND lines, and where they cross. These name are from the old privately owned companies that built and ran the lines-they officially went bankrupt, and those names officially went away before WWII!

They are finally beginning to disappear, and only old timers know and refer to them.
the newest NYer's and tourist do things like refer to the 'red line' (the west side irt line in manhattan is coded red on the newest maps) i might call the line the 1 (and 9) or the broadway local, but the 'red line'? where do they think they are?