 Later, these terms were defined such that "street" designated roads running north and south and aligned with the hundreds of the numbering system, with "court" for intermediate (non-hundreds) north-south roads and "way" for roads which start north-south but curve to intersect with another north-south road; "avenue", "place", and "drive" (respectively) are the corresponding terms for roads running east and west.Major arterials in both directions, however, are often called "boulevards", and "road" and "parkway" also make appearances.Attempts to rationalize the street system began early.