A secondary horn system for a vehicle includes a processor and a memory communicably coupled to the processor and storing a secondary horn system control module. The control module may include instructions that when executed by the processor cause the processor to determine a presence of an alert space along a projected path of the vehicle and, responsive to a determination of the presence of an alert space, control operation of a secondary horn system to transmit a sound into the alert space. The system may provide for autonomous operation of the secondary horn system in certain driving situations, thereby easing demands on the driver and enhancing driver safety.