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 the founder of Greater Greater Washington and its board president. 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.