In 1897, commuters could take a streetcar right to the Hamilton Avenue Ferry. From there it was an easy walk to the businesses clustered around Atlantic Basin. Streetcars also ran to the similarly busy Erie Basin.
This according to the Brooklyn Rapid Transit company's 1897 Handy Map of Brooklyn
At that time, one could take a bus over the Brooklyn Bridge, which opened in 1883, but the Hamilton Avenue Ferry remained a popular choice and would remain in service until 1942.
The Brooklyn Rapid Transit company was a precursor to the MTA, NYC's government run subway and bus system