Slugging
Slugging, also known as casual carpooling and flexible carpooling, is the practice of forming ad hoc, informal carpools for purposes of commuting, essentially a variation of hitchhiking. A driver picks up these non-paying passengers at key locations, as having these additional passengers means that the driver can qualify to use an HOV lane or not be subject to road pricing. Slugging is common mostly in the U.S., specifically in major cities such as the Washington metropolitan area, San Francisco, Houston.
