A stream of cars is circulating in a roundabout you want to enter. What should you do?
Correct answer: Wait for a safe gap in circulating traffic
Yield to vehicles already circulating. Enter during a safe gap; do not assume circulating drivers must create a space for you.
Source: ADOT, How do I enter a modern roundabout when traffic is congested? — yield at entry. ↗
You reached a roundabout entry before a car reached another entry. Does arriving first give you priority over traffic already circulating?
Correct answer: No; entry depends on a safe gap, not arrival order
A roundabout is not a first-come, first-served four-way stop. Circulating traffic has priority; each entering driver selects a safe gap.
Source: ADOT, Is a modern roundabout like a four-way stop? — arrival order. ↗
Which way does normal traffic circulate around the central island of an Arizona modern roundabout?
Correct answer: Counterclockwise
Traffic circulates counterclockwise around the center island. Follow the entry and one-way controls rather than turning against circulation for a shorter route.
Source: ADOT, Is a modern roundabout like a four-way stop? — direction of circulation. ↗
A roundabout approach has a posted 15 mph limit. You remember general roundabout advice mentioning 25 mph. Which should guide this approach?
Correct answer: Slow to the posted limit, or less if needed
Follow the posted speed limit and drive with care. A general range used to describe roundabouts does not override a lower posted limit or unsafe conditions.
Source: ADOT, Driving through a modern roundabout doesn’t have to be confusing — slow to the posted speed limit. ↗
A 45-foot vehicle combination needs extra lane space to negotiate a roundabout. Must it remain entirely in one lane regardless of its turning path?
Correct answer: No; necessary lane deviation is permitted with due care
A vehicle or combination at least 40 feet long or at least 10 feet wide may deviate from its lane as necessary to approach and drive through a roundabout, with due regard for other traffic.
Source: Arizona Revised Statutes 28-778, subsection A. ↗
You and a 45-foot truck are about to travel through a roundabout so closely that your paths would create an immediate hazard. What must you do?
Correct answer: Yield to the truck, slowing or stopping if necessary
When approaching or driving through a roundabout, yield to a qualifying large vehicle going through at the same time or close enough to create an immediate hazard. Slow or stop if necessary.
Source: Arizona Revised Statutes 28-778, subsection B. ↗
You are already driving through a roundabout. A large truck is still approaching its entry. Does the large-vehicle rule itself require you to stop in the circle to let that approaching truck enter?
Correct answer: No; the rule preserves this circulating-vehicle distinction
The statute expressly does not require a driver already traveling through the roundabout to yield to a qualifying large vehicle that is merely approaching it. Continue cautiously and do not create a collision; this is not permission to ignore an actual hazard.
Source: Arizona Revised Statutes 28-778, subsection B. ↗
Your car-and-trailer combination is 42 feet long. A 45-foot truck is on your left as both approach a roundabout closely enough to conflict. Who yields under the large-vehicle rule?
Correct answer: You yield, because your qualifying combination is on the right
When two qualifying vehicles or combinations approach or travel through a roundabout at the same time or so closely as to create an immediate hazard, the driver on the right yields to the driver on the left.
Source: Arizona Revised Statutes 28-778, subsection C. ↗
Your active freeway ramp meter is red, but the freeway looks clear. What should you do?
Correct answer: Stop for the red signal
A ramp-meter red signal must be obeyed like another red traffic signal. Light traffic does not authorize running it.
Source: ADOT, Ramp Meters: Unappreciated or just misunderstood? — obeying the red light. ↗
A ramp meter is signed ONE CAR PER GREEN. The car ahead enters on green and you are close behind. What is required?
Correct answer: Wait for your own green indication
The green release is for one car under this control. Do not follow another vehicle through on its release.
Source: ADOT, Ramp Meters: Unappreciated or just misunderstood? — one car per green. ↗
You reach an active ramp meter as your green appears, without having stopped and with no vehicle ahead using that release. Must you still stop at the meter before proceeding?
Correct answer: No; proceed if it is safe to do so
ADOT allows proceeding without first stopping when the driver reaches green and it is safe. Approach prepared to stop; red and one-car-per-green controls still apply.
Source: ADOT, Ramp Meters: Unappreciated or just misunderstood? — green before stopping. ↗
Signs direct queued traffic to use both open lanes until a zipper-merge point. Where should you normally merge?
Correct answer: At the designated merge point
Where a zipper merge is in place, follow its signs and use the available lanes to the merge point. This guidance does not permit using a closed lane or the shoulder.
Source: ADOT, Let’s talk zipper merge — using lanes until the final merge point. ↗
You reach the signed zipper-merge point beside another queue of traffic. How should the two queues combine?
Correct answer: Take turns, one vehicle from each lane
Alternate vehicles at the merge point. Leave room for the next vehicle rather than blocking drivers who used the other open lane as directed.
Source: ADOT, Let’s talk zipper merge — taking turns at the merge point. ↗
On a divided highway, a vehicle is coming toward you against traffic. What response does ADOT recommend?
Correct answer: Ease off the accelerator, check adjacent space and steer away
Reduce speed, confirm the space beside you is clear, and steer away from the threat. Once in a safe place, call 911 to report the wrong-way driver.
Source: ADOT, Wrong-Way Drivers — What should I do if I encounter a wrong-way driver? ↗
An overhead freeway sign warns of a wrong-way driver ahead. You have not yet seen that vehicle. What should you do?
Correct answer: Safely head toward the nearest highway exit
ADOT advises safely moving toward the nearest highway exit as soon as possible after this warning. Do not make an abrupt unsafe maneuver or cross a prohibited divider.
Source: ADOT, Wrong-Way Drivers — What should I do if I see an overhead sign warning of a wrong-way driver ahead? ↗
You miss a freeway exit and see a low grassy divider between the two roadways. There is no authorized crossover or opening. May you drive across it to turn back?
Correct answer: No; do not cross the dividing space
A divided highway's intervening space or barrier is not a shortcut. Crossing must use an opening or a crossover or intersection established by public authority, with applicable traffic controls obeyed.
Source: Arizona Revised Statutes 28-731 — dividing spaces and authorized openings. ↗
