This appeal involves the single question : Is the 65 miles per hour limit on a State trunk line highway, that is not a freeway, in CLS 1961, § 257.628, as amended by PA 1963, No 143 (Stat Ann 1968 Cum Supp § 9. 2328), a maximum speed limit or a prima facie speed limit?

The trial court held that it was an unqualified maximum, and we affirm.