Defendant appealed the decision of the trial judge sustaining the violation of R.I.G.L. 1956 § 31-14-2 (prima facie limits). The Court held that the radar evidence presented by the town was sufficient to sustain the charge according to the requirements set in State v. Sprague, 322 A.2d 36, 39-40 (R.I. 1974) because the officer testified that he was trained in the use of the radar unit and that the unit had been calibrated prior to the defendant’s radar reading.  Accordingly, the Court sustained the violation.