Aldis, a specialist in next-generation vehicle detection and traffic management systems and developer of the GridSmart vision-based traffic monitoring and control system., has announced that Dr. Bill Sowell has joined its executive management team as senior vice president - international. Most recently serving as managing director for Swarco Middle East, Sowell’s background includes senior level roles in organisations such as Econolite, Peek Traffic, Image Sensing Systems, TEC Engineering and Swarco AG.