In Stroud v. Commonwealth, 6 Va. App. 633, 370 S.E.2d 721 (1988), the Court held that a police officer had a reasonable, articulable suspicion of wrongdoing when he observed the defendant make a U-turn within 100-150 feet of a police roadblock. See Stroud, 6 Va. App. at 636, 370 S.E.2d at 723. The officer testified that based upon his eleven years of experience with the state police he suspected from the driver's conduct that he was attempting to avoid the roadblock because he was either unlicensed or otherwise in violation of the law. See Stroud, 6 Va. App. at 634-35, 370 S.E.2d at 722.