Section 335.07 - Sufficiency rating system for roads on State Highway System(1) The department shall adopt a sufficiency rating system for roads on the State Highway System.(2) Such system shall include, but shall not be limited to, the consideration of the following factors: (3) The determination of rating, at a minimum, shall take into consideration the volume of traffic using the roads and the minimum engineering standards required to safely accommodate such volume of traffic; the age of the roads; the width of pavement and shoulders; the number and degree of curves, both horizontal and vertical; ridability; and maintenance economy.s. 31, ch. 29965, 1955; ss. 23, 35, ch. 69-106; s. 39, ch. 84-309.