A method of cutting grooves having a trapezoidal profile into an airport runway. Each of the grooves has a base of a first width, an open top of a second width and sloped sidewalls. The grooves are cut by the single pass of a rotating blade. The blade used to cut the trapezoidal shaped grooves has a plurality of cutting teeth. Each of the cutting teeth has a wide body section, a face surface, a bottom surface and side surfaces that extend from the face surface to the wide body section. The wide body section has a width equal to the maximum width of the groove being cut. However, the face surface has a width equal to the minimum width of the groove being cut. The result is a cutting tooth that cuts smoothly and maintains its trapezoidal shape as it wears.