For the purpose of carrying into effect the objects and purposes of this chapter, the State Highway Commission shall have full power and authority to negotiate and enter into contracts with the United States and any of its agencies and with the state highway commission or other comparable authority of any adjoining state where a bridge or ferry, or the approaches thereto may be located and to contract for the joint ownership of any bridge or ferry and the approaches thereto and the means and manner of operating and maintaining the bridge or ferry and the approaches thereto.