SHC §485: (a) Route 185 is from Route 92 in Hayward to Route 77 in Oakland.

(a) Route 185 is from Route 92 in Hayward to Route 77 in Oakland. (b) The relinquished former portions of Route 185 within the City of Hayward and within the unincorporated area of the County of Alameda are not a state highway and are not eligible for adoption under Section 81. For the relinquished former portions of Route 185, the City of Hayward and the County of Alameda shall maintain within their respective jurisdictions signs directing motorists to the continuation of Route 185 or to the state highway system, as applicable. (c) (1) The commission may relinquish to the City of Hayward, to the City of San Leandro, or to the County of Alameda all or any portion of Route 185 located within the city limits of those cities or within the unincorporated area of the County of Alameda, as applicable, upon terms and conditions the commission finds to be in the best interests of the state, if the department and either of those cities or the County of Alameda enters into an agreement providing for that relinquishment. (2) A relinquishment under this subdivision shall become effective immediately after the county recorder’s recordation of the relinquishment resolution containing the commission’s approval of the terms and conditions of the relinquishment. (3) On and after the effective date of the relinquishment, both of the following shall occur: (A) The portion of Route 185 relinquished shall cease to be a state highway. (B) The portion of Route 185 relinquished shall be ineligible for future adoption under Section 81. (4) For relinquished portions of Route 185, the City of Hayward, the City of San Leandro, or the County of Alameda shall maintain signs within their respective jurisdictions directing motorists to the continuation of Route 185 or to the state highway system, as applicable. (d) For purposes of this section: (1) The jurisdiction of the City of Hayward shall refer to all relinquished portions of Route 185 within the City of Hayward. (2) The jurisdiction of the City of San Leandro shall refer to all relinquished portions of Route 185 within the City of San Leandro. (3) The jurisdiction of the County of Alameda shall refer to all relinquished portions of Route 185 in the unincorporated area of the County of Alameda.