Lanes, Passing & Highways
Master lane choice, merging, passing, and confident highway driving.
Multi-lane roads reward drivers who plan moves early. Learn how lane choice, merging, passing rules, and freeway entrances and exits fit together, so every change of position becomes deliberate: check, signal, verify, then move. Most questions in this lane test whether you know when a maneuver is legal and when patience is the safer answer.
The rules that matter
- Pass on the left, and return only once you can see both of the passed vehicle's headlights in your mirror.
- Never pass on a hill crest or curve, at an intersection or railroad crossing, or where a solid line is on your side.
- Merge by matching the speed of traffic while still in the acceleration lane. Merging slowly is more dangerous than merging fast.
- Signal, mirror, then shoulder check — in that order — before every lane change.
- Slower traffic keeps right. The left lane is for passing, not for cruising.
- Never back up on a highway or a ramp, even if you missed your exit.
The lessons in this module
Each lesson is one short set of questions. If you've missed questions in this module before, a few come back at the start. Progress saves automatically; sign in only if you want cross-device sync.
Lesson videos
5 lessons · See all →Read this in the handbook
Look for these sections: Lane Use, Passing, Freeway Driving.
Where these rules come from
We do not copy official handbooks — most states do not allow it. What we do instead: state the rule in our own words, then name the official document behind it. 149 questions in this module cite 38 official documents, none checked earlier than 2026-05-17. The 6 most-cited are below.
| Official document | Sections cited |
|---|---|
NHTSA Ten Tips for Safe Driving ↗ National · Checked 2026-08-01 | Safe Driving Basics |
MUTCD 11th Edition, Part 3 — Markings ↗ National · Checked 2026-08-01 | Lane Use and Pavement Markings |
MUTCD 11th Edition, Revision 1 (December 2025) ↗ National · Checked 2026-07-27 | Section 2B.39 — Keep Right and Keep Left Signs (R4-7 and R4-8 Series), Sections 3A.04 and 3B.06 — Longitudinal and White Lane Line Markings |
California Driver's Handbook ↗ State-specific · Checked 2026-07-28 | Following Distance — Highway, Lane Change in Intersection Prohibition, Lane Changing — Inside Intersections |
California Driver's Handbook ↗ State-specific · Checked 2026-05-17 | General Driving |
Alaska Driver Manual ↗ State-specific · Checked 2026-06-18 | Lane Changing and Passing |
Opening a source takes you to the agency's own site, never to a copy of ours. If a source is out of date or broken, say so from any question.
Practice this module
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Review these questions
White arrows painted on the road indicate:
- A. That the lane ends a short distance ahead
- B. Speed limit change
- C. Pedestrian crossing ahead
- D. The required direction of travel for that lane
Show answer
D. The required direction of travel for that lane — White arrows on the pavement indicate the required or permitted direction of travel for that specific lane.
Universal rule · checked against MUTCD 11th Edition, Part 3 — Markings — Lane Use and Pavement Markings · verified 2026-08-01
When passing another vehicle, you should return to your original lane when:
- A. Immediately after passing, too soon to safely clear the passed vehicle
- B. You are 10 car lengths ahead
- C. You are 200 feet ahead of the passed vehicle
- D. You can see both headlights of the passed vehicle in your rearview mirror
Show answer
D. You can see both headlights of the passed vehicle in your rearview mirror — Return to the right lane after passing only when you can see both headlights of the vehicle you passed in your rearview mirror. This ensures you have passed completely and have sufficient clearance.
Universal rule · checked against NHTSA Ten Tips for Safe Driving — Safe Driving Basics · verified 2026-08-01
During heavy freeway traffic, following too closely is dangerous because:
- A. It makes merging easier
- B. It improves visibility
- C. It leaves little time to react if traffic stops
- D. It helps maintain lane discipline
Show answer
C. It leaves little time to react if traffic stops — Tailgating reduces reaction time and increases rear-end crash risk, especially when freeway traffic suddenly slows or stops.
Universal rule · checked against NHTSA Ten Tips for Safe Driving — Safe Driving Basics · verified 2026-08-01
Solid white lines between lanes on a highway indicate:
- A. Lanes are for opposite directions — do not cross
- B. Lanes change speed after this point
- C. Mandatory carpool lane boundaries
- D. Lane changes are discouraged in that area, though not always prohibited
Show answer
D. Lane changes are discouraged in that area, though not always prohibited — Solid white lines between lanes indicate that lane changes are strongly discouraged and potentially unsafe in that area — such as near intersections, in work zones, or near on/off ramps. In some situations they may prohibit lane changes.
Universal rule · checked against MUTCD 11th Edition, Revision 1 (December 2025) — Sections 3A.04 and 3B.06 — Longitudinal and White Lane Line Markings · verified 2026-07-27
When merging, who has the right-of-way?
- A. The larger vehicle
- B. The vehicle that is merging
- C. Traffic already on the freeway
- D. Whoever is traveling faster
Show answer
C. Traffic already on the freeway — Traffic already traveling on the freeway has the right-of-way. As a merging driver, it is your responsibility to find a safe gap and adjust your speed to merge smoothly without forcing other drivers to brake.
Universal rule · checked against NHTSA Ten Tips for Safe Driving — Safe Driving Basics · verified 2026-08-01