Charles Adler Jr. brought safety to the streets and skies. With over 60 patented inventions—including sound-activated traffic lights and flashing aircraft signals—his engineering genius made travel smarter, safer, and more human-focused. Discover more: https://t.co/gRC28OQrQd #CharlesAdler# #TrafficInnovation# #TransportationSafety# #SoundActivatedTech#