I live here. At the time, it was not some giant news story except on the traffic reports. Rush hour traffic nightmares at the Hudson river crossings do not make the news, or there'd be no room for anything else.
My point is only that your idea that Christie wasn't on top of the situation proves he's lying is incorrect. It does the exact opposite, adding credence to his story that he was in the dark. There is no reason in the world that a governor of NJ would be on top of a "there's a traffic jam in Fort Lee" problem unless he knew there were political shenanigans involved.
David Weinstein is/was like his best bud. Of course Christie knew.