The Jungbu Naeryuk Expressway Branch () is an expressway in South Korea, connecting Dalseong County to Buk District, Daegu (30 km). It is numbered 451 and was formerly named the Guma Expressway (구ë§Âê³ ìÂÂëÂÂë¡Â).
Originally, this route was called DaeguâÂÂMasan section (86.4 km). Due to a reform of Korean expressway route numbers in August 2001, the MasanâÂÂHyeonpung JCT section was incorporated into the Jungbu Naeryuk Expressway.
In 2008, the Guma Expressway changed its name to Jungbu Naeryuk Expressway Branch.