(a) When the defendant is the owner or operator of any motor bus or buses, motor coach or coaches, or motor truck or trucks engaged in the business of carrying and transporting either passengers, freight, goods, wares, or merchandise over any of the highways of this state, the service of summons may be had upon an owner or operator by serving the summons upon:
(1) Any clerk or agent of the owner or operator selling tickets or transacting any business for the owner or operator; or
(2) Any driver or chauffeur of any bus, coach, or truck being operated or driven by the driver or chauffeur as a servant, agent, or employee of the owner or operator.
(b) Service had upon the agent or agents of an owner or operator or had upon a chauffeur or driver of any bus, coach, or truck being operated or driven by the driver or chauffeur as a servant, agent, or employee of the owner or operator shall be deemed and considered as good and valid service upon the owner or operator whether the owner or operator is a person, firm, or corporation.
(c) Nothing contained in this section shall be so construed as to repeal any provision of the law of this state as to venue or service of summons in effect on February 26, 1935, except where the law may be in direct conflict with the provisions of this section. It is the intention of this section to provide further and additional methods of obtaining service of summons as against the owners and operators of motor buses, coaches, and trucks, as set out in this section.