Trivia Tuesday: Attention, Everyone!

Photo Clematis Avenue West Palm Beach courtesy State Archives of Florida

Henry Flagler, oil tycoon & railroad magnate, was instrumental in making Palm Beach what it is today. Although he didn't place his own name on anything he created, it graces many buildings, structures, businesses and roads, including a major scenic roadway along the lakefront. Can you figure out which of the below was called the Flagler Alerts?