A. On all roadways of sufficient width, a person shall drive a vehicle on the right half of the roadway except as follows:
1. When overtaking and passing another vehicle proceeding in the same direction under the rules governing the movement.
2. When the right half of a roadway is closed to traffic while under construction or repair.
3. On a roadway divided into three marked lanes for traffic under the rules applicable on the roadway.
4. On a roadway designated and signposted for one-way traffic.
B. On all roadways, a person driving a vehicle proceeding at less than the normal speed of traffic at the time and place and under the conditions then existing shall drive the vehicle in the right-hand lane then available for traffic or as close as practicable to the right-hand curb or edge of the roadway, except when overtaking and passing another vehicle proceeding in the same direction or when preparing for a left turn at an intersection or into a private road or driveway.
C. In an age restricted community that is located in an unincorporated area of a county with a population of more than three million persons, a person may drive a golf cart or a neighborhood electric vehicle on a paved shoulder that is adjacent to a roadway or as close as practicable to the right-hand curb or edge of a paved roadway if there is no delineated paved shoulder.
D. Defensive driving school courses that are offered by defensive driving schools operated pursuant to chapter 8, article 7 of this title and traffic survival schools operated pursuant to chapter 8, article 7.1 of this title shall include educational information relating to subsections A and B of this section. The department shall include information relating to subsections A and B of this section in any of the department's examination, information and education materials.
Notes of Decisions
State of Arizona v. Brady Whitman Jr., 301 P.3d 226 (Ariz. Ct. App. 2013).
· cites it 8× “The officer testified, however, that only the broken taillight and the failure to properly observe the stop sign were the violations that had caused him to perform the traffic stop.”
Myhaver v. Knutson, 942 P.2d 445 (Ariz. 1997).
· cites it 4× “2d 205, 210 (1955); A.R.S. §§ 28-721, 28-726. Given these facts, the real and only issue was whether Knutson's conduct was reasonable under the circumstances of the emergency.”
United Dairymen v. Fisher-Miller Hay & Dev. Co., 609 P.2d 609 (Ariz. Ct. App. 1980).
· cites it 10× “(A.R.S. § 28-721(A)). The issue for determination is whether under the facts of this case, taken in a light most favorable to the offering party, Schneider v.”
State v. Sheehan, 807 P.2d 538 (Ariz. Ct. App. 1991).
· cites it 4× “The citations alleged driving left of center, in violation of A.R.S. § 28-721(A), and driving without proper registration, in violation of A.”
Matthews v. Greyhound Lines, Inc., 882 F. Supp. 146 (D. Ariz. 1995).
· cites it 2× “See AR.S. § 28-721(A). The only genuine issue of fact is whether the driver drove the bus off the roadway because the bus driver was asleep or because the bus driver was blinded by that morning’s sunrise.”
City of Tucson v. Gallagher, 483 P.2d 798 (Ariz. Ct. App. 1971).
· cites it 2× “Based upon the appellees’ contention that McMahon reasonably mistook the unpaved desert right of way of Golf Links Road as a road and the ditch for a dip in the road, appellant offered its instruction number 1 concerning the duty to drive on the right side of a road, A.R.S. §…”
Petefish v. Dawe, 672 P.2d 937 (Ariz. Ct. App. 1982).
· cites it 2× “In considering whether a person’s antecedent negligence created the sudden emergency, we are of the opinion that the issue must be addressed in terms of causation in fact.”
State of Arizona v. Asalia Guadalupe Alvarez-Soto (Ariz. Ct. App. 2024).
· cites it 29× “In particular, she argues that driving “at and around the speed limit in the middle lane of I-10” is not a violation of A.R.S. § 28-721(B), which requires vehicles driving more slowly than the surrounding traffic to drive in the right-hand lane.”
Chavez v. Campbell, 397 F. Supp. 1285 (D. Ariz. 1973).
· cites it 2× “On February 1, 1973, plaintiff was driving his automobile on a public street in Phoenix, Arizona, and was arrested and charged with a violation of A.R.S. § 28-721 (A), failure to drive on the right side of the roadway, and with violation of A.”
State of Arizona v. Asalia Guadalupe Alvarez-Soto (Ariz. 2025).
· cites it 20× “BACKGROUND ¶2 On December 14, 2018, while patrolling Interstate 10 (“I-10”) in Pinal County, Trooper Ashton Shewey (“Shewey”) suspected Defendant, Asalia Guadalupe Alvarez-Soto, violated A.R.S. § 28-721(B) (impeding traffic flow by failing to drive in the right lane) and…”
State of Arizona v. Asalia Guadalupe Alvarez-Soto (Ariz. 2025).
· cites it 20× “BACKGROUND ¶2 On December 14, 2018, while patrolling Interstate 10 (“I-10”) in Pinal County, Trooper Ashton Shewey (“Shewey”) suspected Defendant, Asalia Guadalupe Alvarez-Soto, violated A.R.S. § 28-721(B) (impeding traffic flow by failing to drive in the right lane) and…”
Romero v. Cooper, 325 P.2d 412 (Ariz. 1958).
· cites it 2× “1939, as amended (now A.R.S. § 28-721), a person must drive on the right-hand side of the road.”
— Ariz. Rev. Stat. § 28-721(A) — 5 cases
State v. Sheehan, 807 P.2d 538 (Ariz. Ct. App. 1991).
“The citations alleged driving left of center, in violation of A.R.S. § 28-721(A), and driving without proper registration, in violation of A.”
United Dairymen v. Fisher-Miller Hay & Dev. Co., 609 P.2d 609 (Ariz. Ct. App. 1980).
“(A.R.S. § 28-721(A)). The issue for determination is whether under the facts of this case, taken in a light most favorable to the offering party, Schneider v.”
State of Arizona v. Brady Whitman Jr., 301 P.3d 226 (Ariz. Ct. App. 2013).
“The officer testified, however, that only the broken taillight and the failure to properly observe the stop sign were the violations that had caused him to perform the traffic stop.”
Matthews v. Greyhound Lines, Inc., 882 F. Supp. 146 (D. Ariz. 1995).
“See AR.S. § 28-721(A). The only genuine issue of fact is whether the driver drove the bus off the roadway because the bus driver was asleep or because the bus driver was blinded by that morning’s sunrise.”
— Ariz. Rev. Stat. § 28-721(A)(4) — 1 case
— Ariz. Rev. Stat. § 28-721(B) — 4 cases
State of Arizona v. Asalia Guadalupe Alvarez-Soto (Ariz. Ct. App. 2024).
“In particular, she argues that driving “at and around the speed limit in the middle lane of I-10” is not a violation of A.R.S. § 28-721(B), which requires vehicles driving more slowly than the surrounding traffic to drive in the right-hand lane.”
United Dairymen v. Fisher-Miller Hay & Dev. Co., 609 P.2d 609 (Ariz. Ct. App. 1980).
“(A.R.S. § 28-721(A)). The issue for determination is whether under the facts of this case, taken in a light most favorable to the offering party, Schneider v.”
State of Arizona v. Asalia Guadalupe Alvarez-Soto (Ariz. 2025).
“BACKGROUND ¶2 On December 14, 2018, while patrolling Interstate 10 (“I-10”) in Pinal County, Trooper Ashton Shewey (“Shewey”) suspected Defendant, Asalia Guadalupe Alvarez-Soto, violated A.R.S. § 28-721(B) (impeding traffic flow by failing to drive in the right lane) and…”
State of Arizona v. Asalia Guadalupe Alvarez-Soto (Ariz. 2025).
“BACKGROUND ¶2 On December 14, 2018, while patrolling Interstate 10 (“I-10”) in Pinal County, Trooper Ashton Shewey (“Shewey”) suspected Defendant, Asalia Guadalupe Alvarez-Soto, violated A.R.S. § 28-721(B) (impeding traffic flow by failing to drive in the right lane) and…”
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