New Hampshire 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.
New Hampshire 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.