Streets and Highways Code § 253.1
ARTICLE 2. The California Freeway and Expressway System
The California freeway and expressway system shall include:
Routes 5, 6, 7, 8, 10, 11, 14, 15, 18, 24, 28, 32, 34, 37, 40, 44, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 59, 60, 61, 63, 65, 67, 68, 70, 71, 73, 74, 78, 80, 81, 83, 85, 87, 88, 89, 90, 93, 97, 100, 102, 103, 105, 107, 108, 118, 121, 122, 124, 125, 126, 134, 136, 139, 140, 145, 148, 149, 154, 156, 161, 163, 164, 179, 181, 183, 184, 199, 205, 210, 215, 217, 221, 223, 230, 232, 234, 235, 237, 238, 239, 241, 242, 247, 249, 251, 257, 258, 259, 261, 280, 330, 371, 380, 405, 505, 580, 605, 680, 780, 805, 880, and 980 in their entirety.