In 1926 she painted her most famous work, "Pittsburgh", a dark and brooding picture now in the permanent collection of the Whitney Museum of American Art, which depicts the gargantuan smokestacks of the Jones & Laughlin steel mills in Pittsburgh. Its focus is an overpowering mass of black and gray smokestacks, thick piping, and crisscrossing wires with only clouds of smoke to relieve the severity of the image, yet it was an image in which she found an ironic beauty. She called the picture "my El Greco" and expressed surprise that viewers in later years interpreted the painting as a work of social criticism. Like the other Precisionists (e.g., Demuth, Charles Sheeler, Louis Lozowick, Stefan Hirsch), she was concerned with applying modernist techniques to renderings of the new industrial and urban landscape, not in commenting on potential dangers the overly mechanized modern world of 1920s America might present. If anything, Precisionism, like Futurism, was a celebration of man-made energy and technology. One year later, she painted "Blast Furnaces", in a similar vein. As noted above, Piero della Francesca's mural depicting "The Story of the True Cross" in Arezzo, with its tubular, static and frozen forms was the major influence on Driggs' "Pittsburgh" (it may have been the major influence for "Blast Furnaces" as well).