The extension was changed to an underground alignment following opposition from industries on the Evergreen Branch. In July 1924, the New York City Board of Transportation (BOT) approved a modified route for recommendation to the Board of Estimate.
Due to opposition from businesses along the Evergreen Branch, the extension was altered to an underground alignment. The New York City Board of Transportation (BOT) approved a revised route in July 1924, which was then forwarded to the Board of Estimate for consideration.