On August 27, 2003, the St. Joseph Valley Parkway freeway carrying US 31 was completed from northwest of Berrien Springs (exit 15) to Napier Avenue near Benton Harbor (exit 24). The former section of M-139 replaced by US 31 was once again designated M-139, with M-139 extending further along the former US 31 to the freeway's exit 15. In 2008, M-139 was planned to extend southerly to end at Main Street (Business US 12, Bus.
On August 27, 2003, the St. Joseph Valley Parkway freeway carrying US 31 was completed from northwest of Berrien Springs (exit 15) to Napier Avenue near Benton Harbor (exit 24). The former section of M-139 replaced by US 31 was re-designated as M-139, extending further along the former US 31 to exit 15. In 2008, plans were in place for M-139 to extend southward to Main Street (Business US 12, Bus.