9.1 Arizona Rules of the Road & Moving Violations (ARS Title 28)

9.1 Arizona Rules of the Road & Moving Violations (ARS Title 28)

AZPOST Comprehensive Examination Focus: Recruits must demonstrate complete statutory mastery of Arizona Revised Statutes (A.R.S.) Title 28 (Transportation Code), distinguishing civil traffic infractions from criminal traffic offenses, analyzing speed regulations under A.R.S. § 28-701 and § 28-701.02, distinguishing reckless from aggressive driving, and applying rules of the road governing intersections, right-of-way, lane discipline, school buses, child restraints, hands-free mobile devices, and commercial vehicle safety pursuant to Ariz. Admin. Code R13-4-116(E)(1)(d)(vi).

Traffic law enforcement is one of the most visible, high-frequency, and legally scrutinized responsibilities of an Arizona peace officer. A thorough grasp of A.R.S. Title 28 enables officers to identify violations accurately, articulate reasonable suspicion or probable cause, file the proper charging instruments, and protect constitutional rights on the roadway.

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1. Statutory Architecture: Civil Traffic vs. Criminal Traffic

Arizona law divides roadway violations into two distinct procedural categories: Civil Traffic Violations and Criminal Traffic Offenses. Understanding this division is critical because procedural rights, burdens of proof, enforcement mechanisms, and judicial outcomes differ fundamentally.

Statutory Definitions (A.R.S. § 28-101)

To apply Title 28 accurately, peace officers must know the baseline statutory definitions:

• Vehicle: A device in, on, or by which a person or property is or may be transported or drawn on a public highway, excluding devices moved exclusively by human power or used exclusively on stationary rails or tracks.
• Motor Vehicle: A self-propelled vehicle, or a vehicle propelled by electric power obtained from overhead trolley wires, but not operated on rails.
• Highway: The entire width between the boundary lines of every way publicly maintained by the federal government, state, county, or municipality if any part is open to the use of the public for purposes of vehicular travel.
• Roadway: That portion of a highway improved, designed, or ordinarily used for vehicular travel, exclusive of the berm or shoulder.
• Sidewalk: That portion of a street between the curb lines, or the lateral lines of a roadway, and the adjacent property lines, intended for the use of pedestrians.
• Intersection: The area embraced within the prolongation or connection of the lateral curb lines, or if none, the lateral boundary lines of the roadways of two highways that join one another at, or approximately at, right angles.
• Driver / Operator: A person who drives or is in actual physical control of a vehicle.
• Business District: The territory contiguous to and including a highway if within any 600 feet along the highway there are buildings in use for business or industrial purposes occupying at least 300 feet of frontage on one side or 300 feet collectively on both sides.
• Residential District: The territory contiguous to and including a highway not comprising a business district if the property on the highway for a distance of 300 feet or more is in the main improved with residences or residences and buildings in use for business.

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2. Speed Regulations: Reasonable & Prudent Speed vs. Criminal Excessive Speed

Speed enforcement in Arizona is anchored by two statutes: the fundamental civil speed rule and the criminal excessive speed statute.

                               [ Arizona Speed Enforcement Spectrum ]
                                                 |
       +-----------------------------------------+-----------------------------------------+
       |                                                                                   |
[ A.R.S. § 28-701(A) ]                                                             [ A.R.S. § 28-701.02 ]
Civil Traffic Violation                                                            Criminal Class 3 Misdemeanor
Speed Greater than Reasonable & Prudent                                            Three Strict Statutory Triggers:
Failure to control speed to avoid collision;                                        1. >35 mph in active school crossing (500 ft)
special road, weather, or traffic hazards                                           2. >20 mph over limit in business/residence
                                                                                    3. >85 mph in any location

Reasonable and Prudent Speed (A.R.S. § 28-701(A))

Under A.R.S. § 28-701(A), a person shall not drive a vehicle on a highway at a speed greater than is reasonable and prudent under the circumstances, conditions, and actual and potential hazards then existing. A person shall control the speed of a vehicle as necessary to avoid colliding with any person, vehicle, or other conveyance on or entering the highway in compliance with legal requirements and the duty of all persons to exercise reasonable care.

• Operational Standard: Speed may be unlawful under § 28-701(A) even if the vehicle is traveling at or below the posted numeric speed limit. Traveling 45 mph in a posted 45 mph zone during a blinding dust storm (haboob), torrential monsoon downpour, dense fog, or on icy roads violates this statute because the speed is not reasonable and prudent for existing roadway conditions.
• Statutory Reduction Triggers (A.R.S. § 28-701(E)): The statute explicitly requires drivers to reduce speed when:
  1. Approaching and crossing an intersection;
  2. Approaching and going around a curve;
  3. Approaching a hill crest;
  4. Traveling on narrow or winding roadways; and
  5. Special hazards exist with respect to pedestrians or other traffic, or by reason of weather or highway conditions.
• Prima Facie Speed Limits (A.R.S. § 28-701(B)): Unless posted otherwise, the statutory prima facie speed limits in Arizona are:
  • 15 mph approaching within 500 feet of an active school crossing;
  • 25 mph in any business district or residential district;
  • 65 mph in other locations on open highways (or up to 75 mph where posted on rural interstate freeways).

Criminal Excessive Speed (A.R.S. § 28-701.02)

Excessive speed is not a civil traffic ticket—it is codified as a Class 3 criminal misdemeanor. A person commits excessive speed under A.R.S. § 28-701.02 by operating a motor vehicle at a speed that exceeds:

1. 35 miles per hour approaching a school crossing (A.R.S. § 28-701.02(A)(1));
2. The posted speed limit by more than 20 miles per hour in a business or residential district, or 45 miles per hour in such a district where no limit is posted (A.R.S. § 28-701.02(A)(2)); OR
3. The posted speed limit by more than 20 miles per hour in any other location (A.R.S. § 28-701.02(A)(3)).

[!WARNING] AZPOST High-Yield Exam Point: Arizona removed the flat 85-mph criminal trigger from A.R.S. § 28-701.02. Outside school crossings, the current test is always more than 20 mph over the posted limit. On Interstate 10 posted at 75 mph, 86 mph is 11 mph over and remains a civil violation of § 28-701; the driver must reach 96 mph to commit the Class 3 misdemeanor. On a 65-mph highway the criminal threshold is 86 mph. Prep material that still prints "over 85 mph anywhere in Arizona" is following the repealed version of the statute. Under § 28-701.02(C), a driver charged under this section may not also be issued a civil complaint under § 28-701 arising out of the same circumstances.

Minimum Speed Regulations & Impeding Traffic (A.R.S. § 28-704)

• Impeding Flow: A person shall not drive a motor vehicle at such a slow speed as to impede or block the normal and reasonable movement of traffic, except when reduced speed is necessary for safe operation or in compliance with law.
• Turnout Rule on Two-Lane Roads (A.R.S. § 28-704(C)): On a two-lane highway where passing is unsafe because of oncoming traffic or other conditions, a slow-moving vehicle behind which five or more vehicles are formed in a line shall turn off the roadway at designated turnouts or wherever sufficient area for a safe turnout exists, in order to permit following vehicles to proceed.

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3. Reckless Driving, Aggressive Driving & Racing on Highways

Arizona statutes distinguish between reckless disregard for safety, multi-violation aggressive driving patterns, and organized speed contests.

[ Reckless Driving (A.R.S. § 28-693) ]               [ Aggressive Driving (A.R.S. § 28-695) ]
Class 2 Misdemeanor                                  Class 1 Misdemeanor
Driving in reckless disregard for                     Prerequisite: Speed violation (§ 28-701 or § 28-701.02)
the safety of persons or property                     PLUS at least TWO moving violations from statutory list:
(Subjective state of mind / gross indifference)       - Running red light / sign (§ 28-645)
                                                      - Unsafe lane change (§ 28-729)
                                                      - Following too closely (§ 28-730)
                                                      - Failing to yield right-of-way (§§ 28-771 to 28-776)
                                                      - Passing on right off pavement (§ 28-724)
                                                      AND driving represents an immediate hazard to others

Reckless Driving (A.R.S. § 28-693)

• Classification: Class 2 misdemeanor (first offense). If convicted of a second offense within 24 months, it is elevated to a Class 1 misdemeanor, and the driver is not eligible for probation or suspended sentence until serving at least 20 days in jail.
• Elements: A person commits reckless driving if the person drives a vehicle in reckless disregard for the safety of persons or property.
• Legal Mental State: Culpable mental state of recklessness as defined in A.R.S. § 13-105: the driver is aware of and consciously disregards a substantial and unjustifiable risk that their conduct will endanger persons or property. The risk must be of such a nature and degree that disregard thereof constitutes a gross deviation from the standard of conduct that a reasonable person would observe.

Aggressive Driving (A.R.S. § 28-695)

• Classification: Class 1 misdemeanor (the highest misdemeanor classification in Arizona).
• Mandatory Sanctions: In addition to criminal penalties, conviction results in mandatory completion of Traffic Survival School and a 30-day driver license suspension on a first offense.
• The Three-Prong Statutory Test: To establish aggressive driving under A.R.S. § 28-695, the state must prove all three of the following prongs beyond a reasonable doubt:
  1. Prong 1 (Speed): The driver violated speed regulations under A.R.S. § 28-701 (reasonable and prudent) or A.R.S. § 28-701.02 (excessive speed); AND
  2. Prong 2 (Two Additional Moving Violations): The driver committed at least TWO of the following moving violations during the same continuous course of driving:
     • Failure to obey traffic control devices (A.R.S. § 28-645);
     • Overtaking and passing on the right by driving off the pavement or main traveled portion of the roadway (A.R.S. § 28-724);
     • Unsafe lane change or failure to stay within a single lane (A.R.S. § 28-729);
     • Following another vehicle too closely (A.R.S. § 28-730); OR
     • Failure to yield the right-of-way (A.R.S. §§ 28-771 through 28-776); AND
  3. Prong 3 (Immediate Hazard): The person's driving represents an immediate hazard to another person or vehicle.

Racing on Highways / Exhibition of Speed (A.R.S. § 28-708)

• Classification: Class 1 misdemeanor.
• Elements: A person shall not drive a vehicle or participate in any manner in a race, speed competition or contest, drag race or acceleration contest, test of physical endurance, or exhibition of speed or acceleration on a highway.
• Mandatory Impoundment: Under A.R.S. § 28-3511, a peace officer shall immobilize or impound a motor vehicle for 30 days if the officer arrests the driver for a violation of § 28-708.

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4. Traffic Control Devices & Traffic Signal Violations

Traffic control devices standardize driver expectations and intersection priority. Officers must master obedience rules and signal interpretations.

Obedience to Traffic Control Devices (A.R.S. §§ 28-644 & 28-645)

• General Obedience (A.R.S. § 28-644): The driver of any vehicle shall obey the instructions of an official traffic control device applicable to the driver, unless otherwise directed by a traffic or police officer.
• Traffic Control Signal Legend (A.R.S. § 28-645):
  • Steady Green Signal: Vehicular traffic facing a green circular signal may proceed straight through or turn right or left unless a sign prohibits the turn. Drivers must yield the right-of-way to other vehicles and pedestrians lawfully within the intersection or an adjacent crosswalk at the time the signal is exhibited.
  • Steady Yellow Signal: Warns vehicular traffic that the related green movement is being terminated or that a red indication will be exhibited immediately thereafter. Yellow warns that a red light is imminent; it is not an invitation to accelerate.
  • Steady Red Signal: Vehicular traffic facing a steady red signal alone shall stop at a clearly marked stop line, or if none, before entering the crosswalk on the near side of the intersection. Turning on red is permitted under specific conditions:
    • Right Turn on Red: Permitted after coming to a complete stop and yielding the right-of-way to pedestrians and oncoming traffic, unless a sign explicitly prohibits turning on red (e.g., "No Turn on Red").
    • Left Turn on Red: Permitted only when turning from a one-way street onto another one-way street, after coming to a complete stop and yielding to all oncoming traffic and pedestrians, unless prohibited by signage.

Flashing Signals (A.R.S. § 28-647)

• Flashing Red Signal: Equivalent to a Stop Sign. When a red lens is illuminated with rapid intermittent flashes, drivers shall stop at a clearly marked stop line, or before entering the crosswalk, and the right to proceed is subject to the rules applicable after making a stop at a stop sign.
• Flashing Yellow Signal: When a yellow lens is illuminated with rapid intermittent flashes, drivers may proceed through the intersection or pass such signal only with caution.

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5. Arizona Right-of-Way Statutory Mandates (A.R.S. §§ 28-771 through 28-776)

Right-of-way statutes establish clear legal priority at intersections, turning points, and emergency encounters. Failure to yield is one of the leading primary collision factors investigated by Arizona law enforcement.

Pedestrian Right-of-Way (A.R.S. §§ 28-792 & 28-793)

• In Crosswalks (A.R.S. § 28-792): When traffic control signals are not in place or not in operation, the driver of a vehicle shall yield the right-of-way to a pedestrian crossing the roadway within any crosswalk (marked or unmarked) when the pedestrian is upon the half of the roadway upon which the vehicle is traveling, or when the pedestrian is approaching so closely from the opposite half as to be in danger.
• Overtaking Stopped Vehicle at Crosswalk (§ 28-792(B)): Whenever any vehicle is stopped at a marked crosswalk or at any unmarked crosswalk at an intersection to permit a pedestrian to cross, the driver of any other vehicle approaching from the rear shall not overtake and pass the stopped vehicle.
• Crossing at Other Than Crosswalks (A.R.S. § 28-793): Every pedestrian crossing a roadway at any point other than within a marked crosswalk or within an unmarked crosswalk at an intersection shall yield the right-of-way to all vehicles upon the roadway.

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6. Lane Discipline, Turning, Passing & School Bus Safety

Lane Usage & Unsafe Lane Change (A.R.S. § 28-729)

Whenever any roadway has been divided into two or more clearly marked lanes for traffic:

1. A vehicle shall be driven as nearly as practical entirely within a single lane and shall not be moved from that lane until the driver has first ascertained that the movement can be made with safety.
2. Official signs may direct slow-moving traffic to use designated lanes or allocate specific lanes to traffic moving in the same direction.

Overtaking & Passing Violations (A.R.S. §§ 28-721 through 28-724)

• Drive on Right Side of Roadway (A.R.S. § 28-721): Vehicles shall be driven upon the right half of the roadway, except when overtaking and passing another vehicle, when an obstruction exists, or on roadways divided into three marked lanes or designated for one-way traffic.
• Passing on the Right (A.R.S. § 28-724): A driver may overtake and pass on the right of another vehicle only under the following conditions:
  1. When the vehicle overtaken is making or about to make a left turn; OR
  2. Upon a street or highway with unobstructed pavement not occupied by parked vehicles of sufficient width for two or more lines of moving vehicles in each direction; OR
  3. Upon a one-way street.
  • The Off-Pavement Prohibition (§ 28-724(B)): The driver of a vehicle may overtake and pass another vehicle on the right only under conditions permitting such movement in safety. In no event shall such movement be made by driving off the pavement or main traveled portion of the roadway (such as driving onto the dirt shoulder).

Following Too Closely (A.R.S. § 28-730)

The driver of a motor vehicle shall not follow another vehicle more closely than is reasonable and prudent, having due regard for the speed of the vehicles, traffic upon the highway, and roadway conditions. Peace officers articulate following too closely by documenting traveling speed, estimated distance in vehicle lengths or feet, braking capabilities, roadway moisture, and whether the following distance left insufficient margin to avoid a collision if the lead car stopped abruptly.

Required Position and Method of Turning (A.R.S. § 28-751)

• Right Turns: Both the approach for a right turn and a right turn shall be made as close as practicable to the right-hand curb or edge of the roadway.
• Left Turns on Two-Way Roadways: The approach for a left turn shall be made in that portion of the right half of the roadway nearest the centerline thereof, and after entering the intersection, the left turn shall be made so as to leave the intersection to the right of the centerline of the roadway being entered.
• Continuous Signal Requirement (A.R.S. § 28-754): A signal of intention to turn right or left shall be given continuously during not less than the last 100 feet traveled by the vehicle before turning.

School Bus Overtaking & Stop Requirements (A.R.S. § 28-857)

School bus safety is rigorously enforced to protect children embarking and disembarking.

  [ Northbound Lanes ] ====================> VEHICLES MUST STOP
  -----------------------------------------
  [ Two-Way Left Turn Lane (Painted) ] ----> NOT A PHYSICAL BARRIER!
  -----------------------------------------
  [ Southbound Lanes ] <==== [ SCHOOL BUS ] (Flashing Red + Stop Arm Extended)
                             VEHICLES MUST STOP

• General Rule (A.R.S. § 28-857(A)): On meeting or overtaking from either direction any school bus that has stopped on the highway with alternating flashing red lights and an extended stop arm, the driver of a vehicle shall stop before reaching the school bus and shall not proceed until the school bus resumes motion or the visual signals are deactivated.
• The Divided Highway Exception (A.R.S. § 28-857(C)): The driver of a vehicle on a highway with separate roadways need not stop on meeting or passing a school bus that is on a different roadway. Separate roadways mean physical barriers, concrete medians, or unpaved dividing strips.

[!CAUTION] Critical School Bus Exam Trap: A painted continuous two-way left-turn lane (center turn lane) is NOT a physical barrier or separate roadway. On a five-lane arterial (two lanes northbound, two lanes southbound, and one painted center turn lane), vehicles traveling in ALL lanes in BOTH directions must stop for a school bus displaying flashing red lights and an extended stop arm. Only a raised physical median or unpaved divider excuses opposing traffic from stopping.

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7. Occupant Restraints, Distracted Driving & Equipment Standards

Child Passenger Restraint System (A.R.S. § 28-907)

• Age and Height Thresholds: A person who transports a child who is under eight years of age AND who is under 4 feet 9 inches in height (57 inches) in a motor vehicle shall properly secure the child in a child passenger restraint system meeting federal motor vehicle safety standards (child safety seat or booster seat).
• Enforcement Status: Primary Enforcement. Peace officers may stop a vehicle solely for observing an improperly restrained child meeting the statutory criteria.

Adult Lap and Shoulder Belt Usage (A.R.S. § 28-909)

• Requirements: Each front-seat occupant of a motor vehicle designed for carrying ten or fewer passengers shall have the lap and shoulder belt properly fastened while the vehicle is in motion. Children between 8 and 16 years of age must be restrained anywhere in the vehicle (front or rear seats).
• Enforcement Status: Secondary Enforcement for front-seat adults. A peace officer shall not stop or issue a citation to a person solely for an adult front-seat seat belt violation under § 28-909. The officer must have stopped the vehicle for another suspected traffic violation or criminal offense first.

Hands-Free Wireless Device Law (A.R.S. § 28-914)

• Prohibited Conduct: A person may not operate a motor vehicle on a street or highway while physically holding or supporting with any part of the body a portable wireless communication device or stand-alone electronic device.
• Permissible Activities: Hands-free voice operation, Bluetooth integration, single-touch engagement/swiping, navigation viewing when mounted on dashboard or windshield, and emergency calls to 911 or first responders.
• Enforcement Status: Primary Enforcement civil traffic violation.

Vehicle Lighting & Mandatory Equipment (A.R.S. §§ 28-921 through 28-964)

• When Lighted Lamps Are Required (A.R.S. § 28-922): From sunset to sunrise, and at any other time when there is not sufficient light to render persons and vehicles clearly discernible on the highway at a distance of 500 feet ahead.
• Headlamps (A.R.S. § 28-924): At least two headlamps with at least one on each side of the front of every motor vehicle (other than a motorcycle).
• Tail Lamps & License Plate Lamp (A.R.S. § 28-925): At least one tail lamp emitting a red light plainly visible from 500 feet to the rear. A white light must illuminate the rear registration plate to make it clearly legible from a distance of 50 feet to the rear.
• Stop Lamps & Turn Signals (A.R.S. § 28-927 & § 28-939): Stop lamp actuated by foot brake emitting red or amber light visible 100 feet to the rear.

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8. Commercial Motor Vehicle (CMV) Safety & Weight Regulations

Commercial vehicle enforcement protects highway infrastructure and safeguards motorists from overloaded or poorly maintained heavy transport vehicles. Enforced pursuant to A.R.S. Title 28, Chapters 14 and 19, and the Federal Motor Carrier Safety Regulations (FMCSR, 49 CFR Parts 350–399).

Statutory Weight Thresholds & Limitations

Safety Inspections & Out-of-Service Orders (A.R.S. § 28-5230)

Certified commercial vehicle enforcement officers conduct standardized North American Standard (NAS) Inspections:

• Level I (Full Inspection): Comprehensive examination of driver credentials, logbooks, medical card, and full mechanical undercarriage inspection (brakes, steering, suspension, frame, tires, coupling devices, exhaust, fuel system).
• Level II (Walk-Around Inspection): Driver credentials examination and walk-around visual mechanical inspection without getting beneath the vehicle.
• Level III (Driver-Only Inspection): In-depth review of driver license, medical certificate, hours-of-service records, seat belt, and inspection reports.
• Out-of-Service (OOS) Authority: If critical safety defects exceed Commercial Vehicle Safety Alliance (CVSA) out-of-service criteria (e.g., 20% or more brake chambers defective, cracked frame, bald steer tires, driver exceeding hours of service), the officer places the vehicle or driver Out-of-Service. Operating a vehicle placed out of service is a Class 1 misdemeanor under A.R.S. § 28-5240.

Driver Hours of Service (HOS) & Electronic Logging Devices (ELDs)

• Property-Carrying Commercial Drivers: Under 49 CFR Part 395, drivers of commercial motor vehicles carrying property may not drive more than 11 cumulative hours following 10 consecutive hours off-duty; may not drive beyond the 14th consecutive hour after coming on duty; and may not drive after being on duty 60 hours in 7 consecutive days (or 70 hours in 8 consecutive days).
• Electronic Logging Devices (ELDs): Commercial drivers must record duty status utilizing an FMCSA-registered electronic logging device synchronized with the engine control module.

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9. High-Yield Exam Traps & Operational Application Scenario

High-Yield Exam Traps for Section 9.1

1. Excessive Speed Classification: A.R.S. § 28-701.02 is a Class 3 criminal misdemeanor, not a civil traffic infraction, but the trigger is more than 20 mph over the posted limit (or 35 mph approaching a school crossing). There is no flat 85-mph rule — 86 mph is criminal on a 65-mph road and civil on a 75-mph freeway.
2. Aggressive Driving Multipliers: A.R.S. § 28-695 requires speeding PLUS at least two enumerated moving violations that create an immediate hazard. Speeding alone, or speeding plus only one moving violation, does not satisfy the statutory elements.
3. Divided Roadways vs. Painted Turn Lanes: Opposing traffic is excused from stopping for a school bus only if there is a physical barrier or median. A painted continuous two-way left-turn lane does NOT exempt opposing traffic.
4. Seat Belt Enforcement Tiers: Child restraint (§ 28-907) is primary enforcement. Adult front-seat seat belt (§ 28-909) is secondary enforcement.
5. Passing on the Right: A.R.S. § 28-724 prohibits passing on the right by driving off the pavement or main traveled portion of the roadway.

Operational Application Scenario

Scenario: Officer Martinez is on stationary radar patrol along a multi-lane commercial corridor posted at 40 mph. A sedan approaches at 63 mph (23 mph over the posted limit in a business district). As the vehicle passes through an active school crossing zone with flashing yellow beacons, the officer clocks the vehicle at 46 mph (exceeding 35 mph in a school crossing). The driver then swerves across two lanes without signaling (§ 28-729), tailgates a pickup truck within four feet at 50 mph (§ 28-730), and abruptly turns left across the path of an oncoming vehicle that had the right-of-way (§ 28-772), forcing the oncoming car to brake violently to avoid a broadside collision.

• Speed Charging Analysis: The driver committed Excessive Speed under A.R.S. § 28-701.02 on two independent grounds: exceeding the posted limit by more than 20 mph in a business district (63 in a 40), and exceeding 35 mph in an active school crossing (46 in a 35). Both violations constitute Class 3 criminal misdemeanors.
• Aggressive Driving Analysis: The driver committed a speed violation, plus three enumerated moving violations (unsafe lane change under § 28-729, following too closely under § 28-730, and failing to yield while turning left under § 28-772), and created an immediate collision hazard. The officer has full probable cause to charge the driver with Aggressive Driving under A.R.S. § 28-695, a Class 1 misdemeanor.