Cal. Sts. & High. Code § 8330

(a) The legislative body of a local agency may summarily vacate a street or highway that has been superseded by relocation.
(b) A street or highway shall not be summarily vacated pursuant to this section if vacation would do either of the following:
1. (1) Cut off all access to a person’s property which, prior to relocation, adjoined the street or highway.
2. (2) Terminate a public service easement, unless the easement satisfies the requirements of Section 8333.