The third annual installation of the world’s largest mobile art gallery, Art on Track, will make its way to the Chicago Loop on August 7. Passengers will have the opportunity to board the eight-car train at the Adams and Wabash platform from 5-10 p.m. Participating artists were handpicked based on their control of new artistic methods in their fields. They will have six hours to produce captivating and provocative work to be experienced by the public.