To cross from one corner of an intersection to the opposite corner through the means of a straight line. This can be accomplished no matter how busy the intersection is as long as the participants are brave and quick enough to avoid oncoming vehicles.
Two people need to get to the north-east corner of an intersection from the south-west corner of the same intersection. While this would normally be achieved through crossing the street to the north and then crossing the street again to the east. Instead, they execute a California crosswalk and run in a straight line diagonally across the intersection