A.  The department of highways may, in connection with the erection of any bridge, construct a combination railroad, or street railway and vehicle traffic bridge.  

B.  The highway department may lease to any person who applies the right or privilege to use the bridge for railroad and for street railway purposes and for the placing and maintaining thereon of transmission cables and wires for telephone, telegraph, and electric power; pipe lines for the transportation of artificial or natural gas or oil; tracks, wires and other equipment for the operation of steam or electric railways; and appliances or equipment for any other purposes.  The department shall not grant to any railroad or other public utility company an exclusive lease or franchise for the use of any bridge constructed under the provisions of this Part.  Equal rights and privileges shall be granted to all railroads and public utility companies to the use of the bridges, upon complying with the terms and conditions and the rules and regulations of the department.  The department shall adopt uniform terms and conditions, rules and regulations for carrying out the provisions of this Sub-section.