OPINION OF THE COURT
This matter comes before us on Salvador Delfin-Colina’s appeal from a judgment of conviction for transportation of an illegal alien, 8 U.S.C. §§ 1324(a)(l)(A)(ii) and (A)(l)(B)(ii), which was entered in the District Court for the Western District of Pennsylvania on December 23, 2004, at the conclusion of a bench trial. 1 Delfin-Colina challenges the District Court’s pretrial order, entered November 10, 2004, denying his motion to suppress evidence obtained from a traffic stop conducted by Pennsylvania State Trooper Bradley Wagner. The District Court had jurisdiction pursuant to 18 U.S.C. § 3231, and we have jurisdiction pursuant to 28 U.S.C. § 1291. For the reasons that follow, we conclude that the District Court did not err in denying Delfin-Colina’s motion to suppress, and hence we will affirm the judgment of conviction.
I. Background
The following narrative relies on the District Court’s findings of fact, which are largely based on undisputed testimony given by Pennsylvania State Trooper Bradley Wagner. At the time of the events at issue, Trooper Wagner was an eight-year veteran of the Pennsylvania State Police. During this period of service, Trooper Wagner wrote hundreds of traffic citations and warnings. Appendix (“App.”) at 17. Also, as part of his patrol duties, Trooper Wagner participated in a Department of Homeland Security overtime program named “STOP,” which requires officers zealously to enforce traffic laws. App. at 14.
On May 27, 2004, Troopеr Wagner was working a “STOP” overtime shift. At 8:00 A.M., he was tasked to perform traffic control at a traffic incident that occurred on Interstate 80 near Mercer, Pennsylvania. While performing these duties, Trooper Wagner observed Delfin-Colina driving a red pickup truck. App. at 14. During the approach of the truck, Trooper Wagner “noticed what appeared to be a ‘necklace’ or ‘pendant’ hanging from the rear view mirror.” App. аt 14. He perceived this item to be low hanging, but “not quite touching the dashboard.” App. at 15. Finally, Trooper Wagner believed that the item had the potential to obscure the driver’s vision because the item was not stationary. App. at 15. 2
Trooper Wagner testified that he believed the object hanging from the rear-view mirror to be a violation of 75 Pennsylvania Consolidated Statutes § 4524(c). He further testified that it was his understanding that “anything” hanging from a rearview mirror is a violation of § 4524(e). 3 App. at 15. Section 4524(c) provides:
*395 Other obstruction. — No person shall drive any motor vehicle with any object or material hung from the inside rear-view mirror or otherwise hung, placed or attached in such a position as to materially obstruct, obscure or impair the driver’s vision through the front windshield or any manner as to constitute a safety hazard.
Trooper Wagner’s understanding of this Pennsylvania Statute was flawed. An object hanging from the inside rearview mirror does not contravene § 4524(c) unless it is positioned in such a way as to “materially obstruct, obscure or impair the driver’s vision through the front windshield.”
Id; see also Com. v. Felty,
Based on his flawed understanding of § 4524(c), Trooper Wagner conducted a traffic stop of the pickup truck. Once Salvador Delfin-Colina’s truck was stopped, Trooper Wagner obtained Delfin-Colina’s identification document (a Mexican driver’s license) as well as identification documents (Mexican elеction cards) from other occupants of the truck. Trooper Wagner then advised Delfín-Colina that he had been stopped because of the object — then discovered to be a crucifix — ■ dangling from the rearview mirror. At this point, the front-seat passenger volunteered that he was a Puerto Rican native, but that the rest of the truck’s occupants were illegal aliens. Trooper Wagner had the truck wait for approximatеly ninety minutes so that he could finish his traffic control duties. He then had the truck follow him to the Mercer State Police barracks — but stopping en route at McDonald’s so that the occupants of the truck could get something to eat. Once the group arrived at the police barracks, all of the illegal aliens were taken into custody and transferred to the Pittsburgh office of the Immigration and Customs Enforcement division. App. at 17. Though a “Notice of Warning” fоr the rearview mirror obstruction vehicle code violation was issued by Trooper Wagner approximately two hours after the initial traffic stop, Trooper Wagner testified that once he discovered that the occupants of the truck were illegal aliens, that . discovery “trumped” everything else. App. at 17.
The District Court found Delfín-Colina guilty of knowingly transporting an illegal alien pursuant to 8 U.S.C. §§ 1324(a)(1)(A)(ii) and (A)(l)(B)(ii). Del-fín-Colina now argues for reversal оf the District Court’s denial of his motion to suppress evidence obtained as a result of Trooper Wagner’s traffic stop. Delfín-Co-lina argued before the District Court that the traffic stop was (1) pretextual 4 and (2) was without probable cause “since the religious pendant which hung from the Defendant’s rearview mirror was, in fact, no obstruction to the Defendant’s visibility and safe driving.” Though finding that “Trooper Wagner is mistaken in his belief that anything hanging from a rearview mirror is a violation of the Pennsylvania Vehicle Code,” the District Court reasoned that “the Defendant is charged in the instant indictment with the crime of transportation of an illegal alien in violation of [8 U.S.C. § 1324(a)(l)(A)(ii) and (A)(l)(B)(ii)] [so] when Trooper Wagner saw the ‘necklace’ or ‘pendant’ hanging from the rearview mirror, he had a reasonable and articulable suspicion that a violation of the Pennsylvania Vehicle Code had occurred.” App. at 21.
II. Analysis
We review for clear error a district court’s factual findings in a suppression hearing. United States v. Kiam, 432 F.3d *396 524, 527 (3d Cir.2006) (citation omitted). We conduct a plenary review of legal rulings and mixed questions of law and fact. Id.
A
At the outset, we must address the question whether reasonable suspicion or the higher standard of probable cause is required to support an investigatory traffic stop under the Fourth Amendment. The Fourth Amendment protects individuals “against unreasonable searches аnd seizures.” U.S. Const. amend. IV. A traffic stop is a “seizure” within the meaning of the Fourth Amendment, “even though the purpose of the stop is limited and the resulting detention quite brief.”
Delaware v. Prouse,
Under
Terry
and subsequent cases, “ ‘an officer may, consistent with the Fourth Amendment, conduct a brief, investigatory-stop when the officer has a reasonable,-articulable suspicion that criminal activity is afoot.’ ”
United States v. Valentine,
The
Terry
standard was for many years accepted as the standard governing run of the mill traffiс stops.
See, e.g., United States v. Velasquez,
While this court has not directly addressed the question whether
Whren
has changed the law of traffic stops,
5
we find persuasive the Ninth Circuit’s reasoning in
Lopez-Soto.
As discussed in that opinion, there is little in
Whren
to suggest that the Court meant to create a new probable cause standard in the context of investigatory traffic stops. Instead, the Court in
Whren
was responding to the situation before it — one in which the officer obviously possessed probable cause. Indeed, though the Court has never explicitly returned to the question
post-Whren,
the Cоurt has later made mention of brief, investigatory stops of “persons or vehicles” in the context of reasonable suspicion.
United States v. Arvizu,
B
Delfin-Colina argues that, even under the permissive reasonable suspiciоn standard, a mistake of law by the seizing officer will render a traffic stop per se unreasonable under the Fourth Amendment. For the reasons stated below, we do not agree.
Though reasonable suspicion is a generally undemanding standard, a police officer does have the initial burden of providing the “specific, articulable facts” to justify a reasonable suspicion to believe that an individual has violated the traffic laws.
See Cortez,
The
Whren
Court explained that a court should undertake an objective review of
*398
the officer’s rationale for the investigatory traffic stop.
The Court held that a stop was reasonable under the Fourth Amendment where officers had probable cause to believe that the petitioner had violated the traffic code, even if the ultimate charge was not related to the traffic stop.
Id.
at 808-09,
Taken together, then,
Terry
and
Whren
stand for the proposition that a traffic stop will be deemed a reasonable “seizure” when an objective review of the facts shows that an officer possessed specific, articulable facts that an individual was violating a traffic law at the time of the stop. In other words, an officer need not be factually accurate in her belief that a traffic law had been violated but, instead, need only produce facts establishing that she reasonably believed that a violation had taken place. Consequently, a reasonable mistake of fact “does not violate the Fourth Amendment.”
Chanthasouxat,
Under this framework, though mistakes of fact are rarely fatal to an officer’s reasonable, articulable belief that an individual was violating a traffic ordinance at the time of a stop, many of our sister circuits have held that mistakes of law — even reasonable ones — can render a traffic stop “unreasonable” under the Fourth Amendment. For example, in
United States v. Miller,
The Ninth Circuit, in
Lopez-Soto,
also agreed with the
Miller
court’s rationale. In
Lopez-Soto,
the officer stopped the defendant because the officer had police academy instruction that the absence of a vehiсle registration sticker visible from the rear provided a reasonable basis for suspicion of a Baja California traffic code violation.
The Tenth Circuit, in
Chanthasouxat,
joined the
Lopez-Soto
and
Miller
courts.
In each of the above cases, the specific, articulable facts revealed that" the alleged infractions upon which the vehicles were stopped were not based in law. ' In other words, the objective review of the record required by Whren showed that the stopped individuals in each оf these cases had not violated any applicable statute or ordinance.
What these cases do not, however, say is that a mistake of law by a police officer renders a traffic stop per se unreasonable. Instead, a mistake of law is only unreasonable when the officer does not offer facts that objectively show that the identified law was actually broken. In situations where an objective review of the record evidence establishes reasonable grounds to conclude that the stopped individual has in fact violated the traffic-code provision cited by the officer, the stop is constitutional even if the officer is mistaken about the scope of activities actually proscribed by the cited traffic-code provision. Therefore an officer’s Fourth Amendment burden of production is to (1) identify the ordinance or statute that he bеlieved had been violated, and (2) provide specific, articulable facts that support an objective determination of whether any officer could have possessed reasonable suspicion of the alleged infraction. As long as both prongs are met, an officer’s subjective understanding *400 of the law at issue would not be relevant to the court’s determination.
C
With these principles in mind, we hold that Trooper Wagner possеssed reasonable suspicion to conduct the traffic stop of Delfin-Colina. Trooper Wagner testified that he was doing traffic control when he noticed what appeared to be a necklace or pendant hanging from the rearview mirror. The hanging item was long enough to almost touch the dashboard, and Trooper Wagner believed the item was not stationary and was thus obscuring the driver’s vision. This information led Trooper Wagner to conclude that the truck driver was violating § 4524(c), which provides that a motor vehicle may not be driven “with any object or material hung from the inside rearview mirror or otherwise hung, placed or attached in such a position as to materially obstruct, obscure or impair the driver’s vision through the front windshield or any manner as to constitute a safety hazard.” Based on this understanding, Trooper Wagner stopped the truck.
Viewed objectively, Troоper Wagner has met his burden to provide specific, articu-lable facts showing that an officer would reasonably believe Delfin-Colina was in violation of § 4524(c). Section 4524(c) prohibits,
inter alia,
hanging items from the rearview mirror if they “materially obstruct, obscure, or impair the driver’s vision through the front windshield,” and Trooper Wagner testified that he believed at the time that Delfin-Colina’s vision was obstructed by the crucifix. More importantly, an officer might have reasonably concluded that such a low-hanging item would either obstruct or otherwise impair the driver’s vision because of its potential to swing back and forth, which was the specific concern cited by Trooper Wagner. Indeed, because of this significant potential for swinging to and fro, anything that hangs such that it is almost touching the dashboard would, arguably, be a
per se
violation of § 4524(c). In any event, the legal justification is “objectively grounded” and Trooper Wagnеr has met his burden of producing specific, articulable facts showing that he possessed reasonable suspicion of a violation under § 4524(c).
Cf. Com. v. Felty,
The only question then is whether Trooper Wagner’s testimony that it was his understanding that anything hanging from a rearview mirror constituted a viоlation of the Pennsylvania Vehicle Code rendered the traffic stop unreasonable. As the law only prohibits items attached to rearview mirrors “in such a position as to materially obstruct, obscure or impair the driver’s vision through the front windshield or any manner as to constitute a safety hazard,” Trooper Wagner made a significant mistake of law. For the reasons given above, however, this mistake of law is distinguishable from the ones made by the officers in Miller, Lopez-Soto, Lopez-Valdez, and Chanthasouxat because an objective review of the facts shows that *401 an officer who correctly interpreted § 4524(c) and was in Trooper Wagner’s position would have possessed reasonable suspicion to believe that Delfín-Colina was in violation of § 4524(c). Because it is this objective analysis that is controlling under Whren, Trooper Wagner’s mistake of law did not render the traffic stop unconstitutional. Holding otherwise would require this court to engage in the type of subjective analysis that the Whren Court singled out as irrelevant in the Fourth Amendment context.
III. Conclusion
For the foregoing reasons, we agree with the District Court’s order of November 10, 2004, denying Delfin-Colina’s motion to suppress evidence obtained from Trooper Wagner’s traffic stop. Accordingly, we will affirm the judgment of conviction.
Notes
. On April 1, 2005, the District Judge sentenced DelfinColina to time served. At that point Delfin-Colina had been in the Allegheny County Jail for approximately ten months.
. Trooper Wagner testified, "Sure. I believe it obscures. It’s a, it’s an item that hangs. It's in the driver's field of vision. It’s not stationary. As you would drive down the road, it would swing and it would be a distraction.” App. at 70.
.Trooper Wagner also testified that "while you operate the vehicle nothing is to be hanging from the rear-view mirror.” App. at 42. He reiterated this point several times throughout his testimony. App. at 34, 42, 43, 53, 54, 55, 68.
. Delfín-Colina did not appeal the District Court's rejection of his pretext argument.
. It is true that quite recently, in
Gibson v. Superintendent of N.J. Dep’t of Law and Public Safety-Division State Police,
