Defendant appealed the decision of the North Providence Municipal Court sustaining the violation of R.I.G.L. 1956 § 31-13-4 (obedience to devices) (specifically, the axle restriction on the Pawtucket River Bridge and the Sakonnet River Bridge imposed by R.I.G.L. 1956 § 31-25-30). The Appeals Panel held that a tractor and attached trailer constitute a single vehicle and are not to be considered two separate vehicles. Therefore, the exception in § 31-25-30 for “truck tractors” applies only to tractors without an attached trailer. Here, the defendant’s tractor was carrying an attached trailer. Accordingly, the Court affirmed the decision of the trial magistrate.