California Code, Streets and Highways Code - SHC § 101.19

(a) The Department of Transportation shall work with the Native American Heritage Commission, the California Advisory Committee on Geographic Names, the Counties of Los Angeles and San Bernardino, and California tribes local to, or historically located along, Route 210, to identify appropriate locations for signs to recognize tribal lands along Route 210 and to name Route 210.

(b) The Department of Transportation shall, through the erection of highway signs and appropriate markers, provide recognition of the historical and cultural importance of the California tribes local to, or historically located in, the Counties of Los Angeles and San Bernardino. The department shall erect those signs and other appropriate markers at the appropriate locations on Route 210, as part of the department's regularly scheduled replacement, modification, and maintenance of highway signs.

(c) The Legislature encourages the Counties of Los Angeles and San Bernardino to adopt resolutions to ensure that all people learn about the approved highway signs.