Systems and methods for determining parking difficulty of segments of a geographic area

Provided are systems and methods for determining the parking difficulty of segments of a geographic area. A system may include portable computers and vehicle navigation systems traversing segments of a geographic area. Location tracks may be received corresponding to the paths of the vehicles. The location tracks may be evaluated to determine if they are from a vehicle searching for parking. Some segments of the searching-for-parking location tracks may be included in a circle event, and the number circle events that include a segment may indicate the difficulty of parking in that segment. The parking difficulty may be expressed as a parking difficulty index and may be transmitted to a computer for view on an interactive map or for use in determining directions to a destination.