 Shortly afterward, I-5 passes through the UC San Diego campus and intersects the northern terminus of I-805 before continuing north and intersecting the western end of SR 56.At this interchange, there is a local bypass that provides the only access to Carmel Mountain Road from both directions and provides the only direct access to SR 56 going northbound.North of the San Diego city limits, I-5 enters the city limits of Solana Beach, and then three incorporated cities to the north