Defendant appealed the decision of the Appeals Panel sustaining the violation of R.I.G.L. 1956 § 31-14-2 (prima facie limits).  The Court held that even with poor weather, heavy traffic, and the car being made of plastic, radar speed readings were admissible as long as the two elements in State v. Sprague, 113 R.I. 351, 233 A.2d 36 (1974), were met. The officer satisfied those two elements; therefore, the Court affirmed the decision sustaining the violation against the defendant.