Electronic signs in Arlington Heights, Illinois, are now using Artificial Intelligence (AI) so AMBER Alerts, tornado warnings, and other public emergencies will take precedence over any other messaging. The signs will soon be used in smart cities, convention centers, and airports.

California Highway Patrol used emergency freeway signs to warn motorists about two suspects involved in shooting and injuring a police officer. The state issued its second Blue Alert on May 7 after the suspects opened fire at a highway patrol officer who tried to pull them over for speeding and driving the wrong way on the highway. California issues a Blue Alert if a suspect poses an imminent threat to the public or other law enforcement personnel. The alerts do not immediately interrupt broadcasting.