 creating a pseudo-superblock with a less predictable street layout inside, though this is not an absolute rule - in more densely populated areas major roads are more frequent, such as every fourth interval - 64th Ave., 68th Ave. and 72nd Ave. in Willowbrook are examples of this.0 Avenue is along the U.S. border, and avenue numbers are incremented based on eight per mile (1.6 km), so for example 80th Avenue would be 10 miles (16 km) from the border.Street numbers also increment eight per mile as they go further east.