Business Loop I-8 - San Diego and La Mesa

This business loop began at the SR 163 and Washington Street interchange and followed Normal Street and El Cajon Boulevard (old U.S. 80) back to Interstate 8 in La Mesa. A handful of reassurance markers appeared along the route within the San Diego city limits through the early 2000s. References to Business Loop I-8 from SR 163 were taken down along northbound in 2001 and southbound in October 2005. One shield remained along the route eastbound as of 2016.

Business Loop I-8 was originally listed in the California State Highway System Signing Log (October, 1991) as

Legislative State Route 163 at Washington Street via El Cajon Boulevard to Interstate 8 near Spring Street in La Mesa.