There is hereby created in the state treasury the security deposit fund. All security deposits that the registrar of motor vehicles requires to be paid under section 4509.12 of the Revised Code and that the registrar receives shall be deposited into the fund. Moneys in the fund shall be applied only to the payment of a judgment for damages arising out of an accident as provided in section 4509.28 of the Revised Code and to the return of security deposits as provided in sections 4509.25 and 4509.29 of the Revised Code. All investment earnings of the fund shall be credited to the roadwork development fund created by section 122.14 of the Revised Code.