Automated Announcements of Approaching Emergency Vehicles

Street intersections that are equipped with traffic lights would also be equipped with means for generating audible announcements of approaching emergency vehicles, according to a proposal. The means to generate the announcements would be implemented in the intersection-based subsystems of emergency traffic-light-preemption systems like those described in the two immediately preceding articles and in “Systems Would Preempt Traffic Lights for Emergency Vehicles” (NPO-30573), NASA Tech Briefs, Vol. 28, No. 10 (October 2004), page 36.