Although the Frankford Line helped to catapult Frankford Avenue into a major shopping district in the early 20th century, the traditionally working-class neighborhood saw decline in the 1950s as many Philadelphians moved to the suburbs. White flight eventually took its hold on the neighborhood throughout the 1970s and 1980s. By 1990, over 30% of the storefronts on Frankford Avenue were vacant. Since this time, Frankford has seen a push for improvement. In 1993, the Philadelphia City Planning Commission adopted the "Frankford Plan" as a blueprint for revitalizing the neighborhood. Although many vacant storefronts remain, businesses catering to new customers have opened in recent years.