model Jeeps, which provided him with some knowledge of the way they sounded when running in good condition. Trooper DiMauro testified that unlike the sounds that a Jeep normally makes, the sound he heard was loud, raspy, and consistent with a serious failing in the exhaust system. We agree with the trial court that the trooper’s aural observations provided a reasonable basis for believing that defendant’s vehicle was not in good mechanical condition, and that this was an adequate basis for the stop. “A reasonable and articulable suspicion of wrongdoing is necessary for a police officer to stop a motor vehicle that is being operated on the highway.” State v. Welch, 162 Vt. 635, 636, 650 A.2d 516, 517 (1994) (mem.); see also State v. Emilo, 144 Vt. 477, 481, 479 A.2d 169, 171 (1984) (<HOLDING>) (quoting Delaware v. Prouse, 440 U.S. 648, 663
holding reasonable and articulable suspicion existed to support the investigatory stop of a vehicle in view of the time of day and the officers prior knowledge of reports of criminal activity in the area holding that a police officers suspicion that a car did not belong in a particular area in the early morning does not meet the requirement that a stop cannot be made without an  articulable and reasonable  suspicion of some criminal wrongdoing holding that an officer can stop an individual if the officer has reasonable articulable suspicion that criminal activity is underfoot holding that an officer does not need reasonable articulable suspicion of drugrelated criminal activity prior to subjecting defendants car to a dog sniff subsequent to a lawful traffic stop holding that an anonymous tip that a person is carrying a gun  without any corroborating evidence  did not provide reasonable suspicion of criminal wrongdoing justifying the officers stop and frisk of that person