Business Spur I-29 - North Sioux City
Unsigned Business Route
Business Spur I-29P is an unsigned route linking I-29 at Exit 4 with parallel old U.S. 77 (Highway 105) along Northshore Drive. The 0.226 mile segment may have been part of a longer loop following SD 105 south to Main Street, Military Road and River Drive west to I-29 at Exit 2. River Drive was previously an unsigned business spur.1
Updated July 31, 2026