A street is an area that connects all of the locations in a neighborhood. Streets allow investigators to move from one area to another. Encounters can sometimes take place in streets (for example - with creatures from the sky), or an investigator can be moved to the street after finishing an encounter in a different area.
Investigators with a Sheldon Gang Membership may use their special ability while in the street, as well as have an Exhibit Encounter if they end in a street with the Ancient Whispers marker. Ithaqua's Icy Winds ability will trigger if he is the Ancient One, and will cause an investigator to lose one Stamina if he ends his turn in the street.