I-805 continues northward through San Diego, where it intersects SR 94, the Martin Luther King Jr. Freeway. As the freeway continues through downtown San Diego, it meets SR 15, the continuation of I-15. It then intersects El Cajon Boulevard before passing under the Hazard Memorial Bridge that carries Adams Avenue. The bridge was named after Roscoe Hazard for his involvement in the construction of several roads and highways in Southern California. I-805 then travels on the Mission Valley Viaduct, a towering reinforced concrete viaduct built in 1972, spanning over Mission Valley and the San Diego River. The viaduct is the top stack of the Jack Schrade Interchange over I-8, which runs along the south side of Mission Valley and crosses underneath the viaduct perpendicularly, and is San Diego County's only symmetrical stack interchange. The San Diego Trolley traffic also runs under the viaduct on the valley floor.