The redesignation is due to SR 37's designation being transferred to a new route (the Frank O'Bannon Highway) from I-64 to SR 64 and SR 145 between St. Croix and Eckerty.
A change in designation occurred for SR 37, resulting from the transfer of its original route to a new highway (Frank O'Bannon Highway), which now spans from I-64 to SR 64 and SR 145 between St. Croix and Eckerty.