The 1909 Plan of Chicago recommended an entire network of new diagonal streets .
The only one ever built was the extension in the 1920s of Ogden from Union Park through the Old Town neighborhood to end at Clark Street opposite Lincoln Park .
The 1909 Plan of Chicago recommended an entire network of new diagonal streets , but the only one ever built was the extension in the 1920s of Ogden from Union Park through the Old Town neighborhood to end at Clark Street opposite Lincoln Park .