"Fixing the Great Mistake" is a new Streetfilms series that examines what went wrong in the early part of the 20th century, when our cities began catering to the automobile, and how those decisions continue to affect our lives today.

In this episode, Transportation Alternatives director Paul Steely White shows how planning for cars drastically altered Park Avenue in New York City. Watch and see what Park Avenue used to look like, how we ceded it to the automobile, and what we need to do to reclaim the street as a space where people take precedence over traffic.