California Code, Streets and Highways Code - SHC § 186.3

Funds apportioned pursuant to Section 2106 may be expended for highway-oriented transportation studies requested by a state or federal agency.  Any expenditure of funds apportioned pursuant to Section 2106 or 2107 by a county or city for the acquisition of rights-of-way or construction upon a state highway, or upon a county road or city street not under the jurisdiction of the county or city that complements the system of roads or streets of the county or city, shall be deemed an expenditure upon the system of roads or streets of the county or city, as the case may be, making such expenditure.