 When NY 324 was assigned c . 1933 , it began at NY 384 ( River Road ; now NY 266 ) in the town of Tonawanda and followed Sheridan Drive eastward to NY 5 in the town of Clarence . By 1935 , what is now NY 324 between Niagara Falls and Tonawanda via Grand Island was designated as NY 325 . NY 324 was extended northward to NY 384 in Niagara Falls c . 1937 , supplanting the entirety of NY 325 . The NY 325 designation was reassigned to the short piece of Sheridan Drive not designated as NY 324 . The route was extended one final time by 1948 to follow NY 384 westward from the North Grand Island Bridge into downtown Niagara Falls . 
