ALEXANDRIA, Va., June 16 -- United States Patent no. 12,307,888, issued on May 20, was assigned to Kapsch TrafficCom AG (Vienna).

"Method and server for controlling traffic lights" was invented by Thomas Scheider (Baden, Austria) and Erich Zoechmann (Vienna).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosed subject matter relates to a method of controlling event-responsive traffic lights at an intersection of lanes by a controller which switches the traffic lights in a sequence of phases. The controller has a memory storing a set of phase sequences and is configured to change from one phase sequence to another. The method comprises, in a server: a) generating candidate sets of phase sequenc...