In the United States and Canada, reassurance markers (also called reassurance shields or confirming shields) usually take the form of a shield displaying the road number on an elevated pole, with a plate above or below it indicating the "official" direction of that side of the route. (The official long-range direction may differ from the short-range direction; for example, a large stretch of I-90 near Buffalo, New York runs north-south, although the route is officially east-west.) The direction portion of the sign confirms that the driver is going the right way along the desired road. On larger roads, reassurance markers are sometimes posted on a sign that is elevated on a gantry.