The effects of the completion of the parkway were nearly immediate. Traffic on the Saw Mill River Parkway lessened with the new parkway, along with a 20% reduction on the Taconic State Parkway. However, while the route south of the Sprain Brook was seeing less traffic, the portion north of Hawthorne to Campfire Road, a section, was seeing much more traffic with the new parkway. Proposals for solving this problem included a $50 million (1982 USD) proposal to widen the Taconic State Parkway to six lanes. NY 9A south of Hawthorne also saw a considerable reduction in traffic and an improvement in the corridor north of NY 100C, becoming more of a commercial center. New industrial parks and office parks were being constructed within a couple years of completion of the new parkway along NY 9A.