I-980早在1947年即被納入加州公路系統,編號為226[2],1959年編入加州高速及快速公路系統[3]。1964年重編號後,公路成為24號加州州道的一部份[4]。聯邦公路管理局在1976年1月批准將這段公路納入州際公路系統,聯邦經費則用於升級San Pablo Avenue以西的路段[5]。1981年,編號確定為980[6]。
直到目前,即使公路已升級到州際公路的水準,I-980東向的路旁標誌仍為24號加州州道。
^"An act to provide for a system of public streets and highways...", 1947 (1st extraordinary session) chapter 11, p. 3798: "Route 226 is from a point in the vicinity of the intersection of Webster Street and Santa Clara Avenue in Alameda to a point on Route 5 [I-580] in Oakland."
^"An act to amend...the Streets and Highways Code, relating to state highways, providing for a California Freeway and Expressway System...", 1959 chapter 1062, p. 3114: "Route 226 [SR 61, SR 260, and I-980] from Route 258 [SR 13] near San Leandro to Route 5 [I-580]."
^"An act...relating to routes on the state highway system.", 1963 chapter 385, p. 1173: "Route 24 is from: (a) Route 17 near Castro Street in Oakland to Route 580..."
^"An act to amend...the Streets and Highways Code, relating to state highways.", 1981 chapter 292, p. 1419: "Route 980 is from Route 17 in Oakland to Route 580."