Two of the most famous streets in the World run the length of Manhattan Island and still farther north. One is named Broadway and the other Fifth Avenue.
She went quickly along the passage to Mrs. Vandemeyer's bedroom, which had long French windows leading on to a balcony that ran the length of the flat.
Sirius grasped his hand briefly, nodded to Dumbledore, transformed again into the black dog, and ran the length of the room to the door, whose handle he turned with a paw.
To ensure that computers don't get confused with which bytes are run lengths and which bytes represent color, we have to be consistent in how we apply this scheme.