All common carriers subject to the provisions of this Chapter shall afford all reasonable, proper and equal facilities for the interchange of traffic between their respective lines and for the forwarding and delivering of passengers and freight to and from their several lines and those connecting therewith, and shall not discriminate in their rates, routes and charges against such connecting lines, and shall be required to make as close connection as practicable for the convenience of the traveling public. Common carriers shall obey all rules and regulations made by the Commission relating to trackage. Irregular route motor carriers shall interchange traffic only with the approval of the Commission. Provided, however, that this section shall not apply to motor carriers of passengers. (1899, c. 164, s. 21; Rev., s. 1088; C.S., s. 1107; 1933, c. 134, s. 8; 1935, c. 258; 1941, c. 97; 1963, c. 1165, s. 1.)