The woman was walking along the upper level of Route 139 at Baldwin Avenue when she was struck on the eastbound side around 8:10 a.m., NJ Advance Media says. She apparently suffered a serious head injury.
The driver was a federal agent but it was not clear if he was on-duty at the time of the crash.
Jersey City officials did not immediately return Daily Voice's request for comment.
Click here for more from NJ Advance Media.
Click here to follow Daily Voice Jersey City and receive free news updates.