A pair of Chicago L trains. The Evanston Express was originally a "shoppers' special", a fast train to the Loop to serve Christmas shoppers from the suburbs. After the war, the Express was reinstated, making limited stops on the Howard line until reaching the Loop. These trains typically ran several times a day, although they lost the "Shoppers' Special" name in the mid fifties.
By the time these 6000-series cars were running the Express, it was running several times a day and was very popular with Evanston residents. The name stayed until 1993, when the various lines were renamed with colors, and the Evanston Express became the Purple Line Express.