[¶ 1] The Director of the North Dakota Department of Transportation appeals from a district court judgment reversing the administrative suspension of Luke Kahl’s driver’s license for driving under the influence of alcohol. We conclude the appeal is not moot and the hearing officer’s finding Kahl drove across the center line was supported by a preponderance of the evidence, giving the officer grounds for a stop. We also conclude the officer had probable cause to arrest Kahl. Therefore, we reverse the judgment and remand for reinstatement of the administrative license suspension.
I
[¶2] On June 30, 1996, a deputy of the Bowman County Sheriffs Department made a routine traffic stop on highway 12. During the stop, another vehicle approached the scene. The driver told the deputy a pickup traveling on highway 12 went into the ditch, came back up onto the road, and proceeded along the highway. The deputy proceeded in his squad car and shortly thereafter observed a pickup traveling on highway 12. The deputy testified, “As I got in behind the vehicle, I watched it for a period of approximately half a mile. It did cross the center line twice, so I proceeded to pull the vehicle over at that time.”
[¶ 3] The deputy approached the driver, Luke Kahl, and asked him for his driver’s license. Kahl said he left it at home. At the deputy’s request, Kahl accompanied him to his squad car. When Kahl was seated in the squad car, the deputy detected an odor of alcohol. Kahl admitted he had been drinking. After conducting field sobriety tests, the deputy arrested Kahl for driving under the influence of alcohol. Blood test results showed Kahl had a blood alcohol concentration of .11 percent.
[¶ 4] Kahl requested an administrative hearing on his license suspension. The hearing officer suspended Kahl’s license for 91 days. Kahl appealed to the district court. The district court found the deputy:
“did not establish whether Kahl’s crossing of the center line was merely ‘slight weaving’ or an ‘erratic movement.’
“[I]t is quite common knowledge that there are thousands of pickup trucks in Southwest North Dakota and it is not at all uncommon for those vehicles to be seen crossing a roadway center line ... without being engaged in any criminal activity.”
The district court found the deputy did not have reasonable and articulable suspicion to stop Kahl. The court reversed the suspension of Kahl’s driver’s license. The Department of Transportation appeals.
[¶ 5] The appeal from the administrative agency decision to the district court was timely under N.D.C.C. § 39-20-06. The district court had jurisdiction under N.D. Const. Art. VI, § 8, and N.D.C.C. § 28-32-19. The appeal from the district court was timely under N.D.C.C. § 28-32-21. This Court has jurisdiction under N.D. Const. Art. VI, § 6, and N.D.C.C. § 28-32-21.
II
[¶ 6] Kahl argues because the district court reversed more than 91 days after the department suspended his license, and he had served the full period of suspension, the appeal is moot. “Mootness is a threshold issue we decide before reaching the merits of the ease.”
Bland v. Commission on Med. Competency,
[¶ 7] “The United States Supreme Court has held that a defendant’s completion of a sentence imposed as a result of a criminal conviction does not render a direct appeal from the conviction moot because of the collateral consequences stemming from a conviction, including consideration of the conviction in sentencing should the defendant again be convicted of a crime.”
Sampson v. State,
*200
[¶8] Although Kahl has completed the ninety-one-day suspension, he now faces enhanced penalties for future violations.
See
N.D.C.C. § 39-20-04.1 (providing longer periods of suspension if a person’s license has previously been suspended, denied, or revoked for a violation of N.D.C.C. § 39-08-01). When a suspension can have detrimental effects on a defendant at some time in the future, the issue of whether the department properly suspended the defendant’s license is not moot, despite the fact the defendant has already served the entire suspension.
See State v. Key,
Ill
[¶ 9] The Administrative Agencies Practice Act governs appeals from an administrative hearing officer’s suspension of a driver’s license under N.D.C.C. § 39-20-04.1.
Rudolph v. North Dakota Dep’t of Transp. Dir.,
[¶ 10] “On appeal, the decision of the agency must be affirmed: (1) if the findings of fact are supported by a preponderance of the evidence; (2) if the conclusions of law are sustained by the findings of fact; (3) if the decision is supported by the conclusions of law; and (4) if the decision is in accordance with the law.”
Zimmerman v. North Dakota Dep’t of Transp. Dir.,
IV
[¶ 11] Kahl argues crossing the center line is not sufficient by itself to create reasonable and articulable suspicion justifying a stop. Kahl also argues the tip the deputy received about the pickup was not sufficiently corroborated to establish reasonable suspicion. The Department argues the deputy had reasonable and articulable suspicion to make the stop because he observed Kahl cross the center line.
[¶ 12] Reasonable suspicion is a standard less stringent than probable cause.
State v. Jesfjeld,
[¶ 13] “N.D.C.C. § 39-10-08(1) requires a vehicle to be driven upon the right half of the roadway, with certain exceptions not relevant here.” Zimmerman at 481. “Failure to comply with this section is a moving violation under N.D.C.C. § 39-06.1-09, subjecting the violator to a $20.00 fine under N.D.C.C. § 39-06.1-06.” Zimmerman.
[¶ 14] The hearing officer’s finding Kahl crossed the center line is supported by *201 the deputy’s testimony. The hearing officer’s conclusion the deputy’s observation of the moving violation constituted a reasonable basis for the stop is in accordance with the law. Because the moving violation gave the deputy not only a reasonable suspicion but also probable cause to stop Kahl’s vehicle, we need not address the issue of whether the tip had been sufficiently corroborated.
V
[¶ 15] Kahl argues the deputy did not have probable cause to arrest him for driving under the influence. The hearing officer found the deputy detected an odor of alcohol coming from Kahl, Kahl admitted drinking five or six beers, and Kahl failed to complete the “one-leg-stand” test, stating he “didn’t think anybody could do the test in his condition.”
[¶ 16] “Probable cause is a question of law, fully reviewable on appeal.”
Chadwick v. Moore,
[¶ 17] Detecting an odor of alcohol “is a relevant factor in determining probable cause.”
Chadwick; see also Mayo v. Moore,
VI
[¶ 18] The decision of the Department is supported by a preponderance of the evidence, the conclusions of law are sustained by the findings of fact, and the decision is in accordance with the law. We therefore reverse the district court judgment and remand for reinstatement of the administrative suspension of Kahl’s driving privileges.
