Maine State Route 109, which begins in Wells at the southern junction of US 1 and SR, is cosigned with SR 9 for its first 2.17 miles (3.49 km) and interchanges with the Maine Turnpike (I-95) (a 303-mile-long highway running from the New Hampshire state line in Kittery, to the Canadian border in Houlton) at exit 19.
Maine State Route 109, which begins in Wells at the southern junction of US 1 and SR, is cosigned with SR 9 for its first 2.17 miles (3.49 km) and interchanges with the Maine Turnpike (I-95) (a 303-mile-long highway running from the New Hampshire state line in Kittery, to the Canadian border in Houlton) at exit 19.