Before cities engineered their roads and traffic patterns for the cars, many modes mixed together.

Ghosts of DC got a hold of a video of Pennsylvania Avenue in 1909, showing horses, bikes, pedestrians, automobiles, and streetcars all chaotically, but successfully, interacting.

David Alpert is Founder and President of Greater Greater Washington and Executive Director of DC Sustainable Transportation (DCST). He worked as a Product Manager for Google for six years and has lived in the Boston, San Francisco, and New York metro areas in addition to Washington, DC. He lives with his wife and two children in Dupont Circle. Unless otherwise noted, opinions in his GGWash posts are his and not the official views of GGWash or DCST.