Construction began on the portion of I-390 between NY 17 near the village of Avoca and NY 21 south of Wayland. It opened to traffic . By 1977, work had begun on the leg between NY 251 in Rush and the New York State Thruway (I-90) in Henrietta. This section was completed by 1981, as were the Dansville–Groveland (NY 36), Avon–Rush, and Thruway – Hylan Drive segments. The remainder of I-390 in Monroe County up to the modern I-390 / I-590 interchange was built , and the final gap in the expressway from NY 36 to US 20 in Livingston County opened .