California Code, Streets and Highways Code - SHC § 954.6

(a) A board of supervisors, by resolution, may terminate the maintenance of all or a portion of a county highway if it finds that another public agency will maintain the highway or that portion of it pursuant to an agreement meeting the requirements of Section 941.6.  The resolution terminating maintenance shall identify the county highway, or portion of it, for which maintenance will be terminated and also the agency that will perform the maintenance.  A certified copy of the resolution shall be recorded in the office of the county recorder.

(b) As to each county highway, or portion of a county highway, for which the board terminates maintenance pursuant to subdivision (a), the county shall post signs at each intersection of that highway with a maintained highway, if any, indicating that the county no longer maintains the highway.  The signs shall be clearly visible from the traveled highway and shall read:  “This road not maintained by __________ County.  __________ County is not responsible for any loss or injury resulting from use of this road.”  The county shall provide adequate maintenance for the signs to ensure that for a period of one year each sign remains posted in the appropriate place and the message is legible.

(c) After a resolution adopted pursuant to subdivision (a) is duly recorded in the office of the county recorder and the signs required by subdivision (b) are posted, while the agreement entered into pursuant to subdivision (a) is in effect, the county shall not be liable for the death of, or injury to, any person or for damage to any real or personal property resulting from a dangerous condition of the highway or portion of the highway, as described in the resolution, caused by inadequate maintenance.