 Route 18 did not enter the Buffalo city limits, however; it ended at the southern city line and resumed at the junction of Kenmore Avenue—which straddles the northern boundary of the city—and Niagara Falls Boulevard.It then followed Niagara Falls Boulevard northwest to Niagara Falls, where it continued to Main Street by way of Pine Avenue.When the first set of routes in the modern state highway system were assigned in 1924, the northern segment of Route 18 was designated as part of NY 34.