California Code, Streets and Highways Code - SHC § 30685

The cost of operation of the toll bridge, including the cost of insurance against loss of tolls or other revenue therefrom, shall be paid from the tolls and revenue received from the use and operation of said bridge. The cost of physical maintenance, including the cost of insurance of said bridge against all risks, shall be paid by the department as provided in Section 188.3 of this code.