By June 15, 1942 the highways in the Grand Rapids area were reconfigured. A Bypass US 16 (Byp. US 16) designation was assigned to the portion of M-114 that traveled around the southwest side of Grand Rapids (now M-11), leaving just the east and unfinished north segments left. The section along the east side of the city was completed as M-114. A northern leg was added along 3 Mile Road at the same time. By 1945, the northern leg of M-114 was turned back to local control and removed from the highway system. The eastern leg was assigned a Byp. US 131 designation, thereby eliminating the last remaining portion of M-114. A Byp. M-21 designation was also used along part of the southern and eastern legs. East Beltline now carries M-37 and M-44.
