USA California DMV Practice Test: Road Markings, Lane Changes, Turns, Merging and Right-of-Way

The California Driver’s Handbook explains how traffic lanes and pavement markings are used to organize traffic. It also provides detailed guidance about changing lanes, choosing lanes, turning, merging onto highways, exiting highways, passing other vehicles, and interacting with other road users. This study guide brings these important concepts together in a practical format for California DMV test preparation. 1

Understanding Traffic Lanes

A traffic lane is a portion of a roadway intended for one line of traffic. Drivers need to understand lane markings because the lines painted on the road communicate whether lanes travel in the same direction, whether passing is permitted, and whether a lane has special restrictions.

California roads may contain yellow lines, white lines, broken lines, solid lines, double lines, bicycle-lane markings, HOV-lane markings, and other pavement markings. Learning what these markings mean is an important part of California DMV practice-test preparation.

When approaching a road with multiple lanes, look at the pavement markings and signs before deciding where to drive. Do not assume that every lane can be used for every maneuver. Some lanes are intended for passing, turning, entering or exiting traffic, bicycles, carpools, or other specific purposes.

Yellow Lane Markings

Yellow lines generally separate traffic traveling in opposite directions. Understanding yellow markings is particularly important when deciding whether passing or crossing into another part of the roadway is permitted.

A single solid yellow line can mark the center of a two-way roadway. When a solid yellow line is on your side of the roadway and there is only one lane traveling in your direction, you should not pass another vehicle across that line.

A broken yellow line can indicate that passing may be permitted when the broken line is next to your lane. However, a broken line does not mean that passing is automatically safe. You must first determine whether there is sufficient visibility, distance, and space to complete the maneuver safely.

Double Solid Yellow Lines

Double solid yellow lines are an important California DMV test topic. In general, drivers should not pass over double solid yellow lines.

California DMV identifies specific situations where crossing certain double yellow lines may be permitted, such as turning left across a single set of double yellow lines to enter or leave a driveway or private road, making a permitted U-turn, or following construction instructions or other signs when your side of the roadway is closed. A double-yellow barrier consisting of two sets of solid double yellow lines separated by space has additional restrictions. 2

The key study point is that double solid yellow lines should be treated as a barrier unless a specific legal exception applies.

White Lane Markings

White lines generally separate lanes traveling in the same direction.

A single solid white line may separate lanes traveling in the same direction. Drivers should pay attention to signs and lane restrictions before crossing a solid white line.

Broken white lines separate lanes traveling in the same direction and generally allow drivers to change lanes when it is safe and legal.

Double solid white lines indicate a lane barrier, such as between a regular lane and a preferential lane. California DMV states that drivers should not change lanes over double solid white lines. Drivers should wait until the marking changes to a broken white line before changing lanes. 3

Yield Lines

A yield line is made of solid white triangles. The points of the triangles face approaching traffic and indicate where vehicles should yield or stop.

When approaching a yield line, carefully observe traffic conditions and follow the applicable yield rule. Do not assume that you can continue without slowing or stopping.

Choosing the Correct Lane

California DMV explains that lanes may be numbered from left to right. The leftmost lane is commonly referred to as Number 1, while the lane to its right is Number 2, followed by Number 3 and so on.

The left lane can be used for passing or left turns, while the right lane is commonly used for entering or exiting traffic or entering the road from a curb or shoulder. Signs and lane markings always take priority over general lane-use guidance. 4

Before making a turn or exit, plan your lane position early. Last-minute lane changes can create dangerous situations and increase the possibility of a collision.

Safe Lane Changes

Changing lanes is one of the most important skills for both the California DMV knowledge test and the behind-the-wheel driving test.

Before changing lanes, signal appropriately, check your mirrors, check traffic behind and beside your vehicle, and look over your shoulder toward the direction you plan to move. This helps you identify vehicles, motorcycles, bicycles, and other road users that may be in your blind spot.

Do not move into another lane simply because your turn signal is activated. A signal communicates your intention; it does not automatically give you permission to move into an occupied lane.

Make sure there is enough space for your vehicle before changing lanes. Once the lane is clear, move smoothly without drifting into another lane.

California DMV recommends staying in one lane as much as possible and avoiding weaving in and out of traffic. Last-minute lane or direction changes can increase collision risk. 5

Blind Spots

Every vehicle has blind spots. These are areas that cannot be fully seen through the vehicle's mirrors.

Before changing lanes, merging, turning, backing up, leaving a parking space, or performing other maneuvers where another road user could be present, check the appropriate blind spot.

California DMV recommends checking blind spots by looking over your shoulder through the appropriate side window. When checking, keep control of the vehicle and avoid turning the steering wheel unintentionally. 6

Motorcycles and bicycles can be especially easy to miss because they occupy less visual space than larger vehicles. Always check carefully before moving across a lane.

Right Turns

Right turns require careful positioning and observation.

Before making a right turn, approach the right side of the roadway or the appropriate designated right-turn lane. Signal before the turn as required. Check for pedestrians, bicyclists, and motorcycles between your vehicle and the curb.

California DMV's handbook explains that drivers should begin signaling approximately 100 feet before a turn, look over the appropriate shoulder, reduce speed, and stop behind the limit line when required. If there is no limit line, stop before entering the crosswalk; if there is no crosswalk, stop before entering the intersection. 7

When turning right, look carefully for pedestrians crossing the road and bicyclists traveling alongside your vehicle.

Complete the turn in the appropriate lane rather than swinging widely into another lane.

Right Turn on Red

A right turn at a red light may be permitted after a complete stop unless a NO TURN ON RED sign prohibits the movement.

Before turning right on red, stop at the appropriate stopping point and yield to pedestrians and other traffic that has the right-of-way. Turn only when it is safe and permitted.

A red arrow is different. California DMV states that drivers stopped at a red arrow may not turn until a green traffic signal or green arrow appears. 8

Left Turns

Left turns require careful observation because the driver may cross or interact with traffic traveling in the opposite direction.

Approach the appropriate left-turn lane or position near the center divider as required. Signal before turning, check your surroundings, and yield to pedestrians and approaching vehicles that are close enough to create a hazard.

When waiting to make a left turn, keep the vehicle positioned safely. California DMV advises keeping the wheels pointed straight ahead while waiting, rather than turning them toward the direction of the intended turn. This can help reduce the risk of being pushed into opposing traffic if the vehicle is struck from behind. 9

Complete the turn into the appropriate lane and avoid entering the path of oncoming vehicles.

Left Turn on Red

California has a specific rule allowing a left turn against a red light in certain circumstances. A left turn against a red light may be made when turning from a one-way street onto another one-way street, provided there is no sign prohibiting the turn and the driver yields appropriately.

Before making such a turn, stop completely, observe the intersection, yield to vehicles, pedestrians, and bicyclists with the right-of-way, and proceed only when safe.

U-Turns

A U-turn changes the direction of travel so the vehicle travels back in the opposite direction.

California law allows U-turns in certain situations but prohibits them in other locations. California DMV explains that U-turns may be permitted across a double yellow line in certain circumstances, at an intersection with a green signal unless prohibited, and at certain openings in divided highways. 10

Drivers should also understand where U-turns are prohibited. Examples include locations with a NO U-TURN sign, railroad crossings, certain divided-highway barriers, locations where visibility is insufficient, one-way streets, and certain business districts.

Never assume that a U-turn is legal simply because there appears to be enough room. Look for signs, markings, visibility restrictions, and other applicable rules.

Center Left-Turn Lanes

A center left-turn lane is located in the middle of a two-way roadway and is designed for left turns and certain U-turns.

It is not a normal travel lane and should not be used as a passing lane.

California DMV explains that a driver may use a center left-turn lane for up to 200 feet before making a left turn or U-turn. Drivers should check for vehicles already using the lane, signal, check blind spots, and merge completely into the center turn lane before making the maneuver. 11

Understanding this distinction is useful for California DMV practice questions because the center left-turn lane has a specific purpose.

Bicycle Lanes

Bicycle lanes are designed for bicyclists and are generally marked by a solid white line and bicycle-related signs or pavement markings.

Drivers should not use a bicycle lane as an ordinary travel lane. California DMV identifies limited circumstances in which a motor vehicle may enter a bicycle lane, including certain movements such as preparing for a permitted turn. Drivers must watch carefully for bicyclists before entering or crossing the lane. 12

Before turning across a bicycle lane, check mirrors and blind spots and yield appropriately.

Carpool and HOV Lanes

High-occupancy vehicle lanes, commonly called HOV or carpool lanes, are special lanes with specific eligibility requirements.

Signs posted near the lane explain the minimum number of occupants, applicable hours, and other requirements. Some vehicles may qualify under special programs, and motorcycles may be permitted unless signs state otherwise.

HOV lanes are commonly identified by diamond pavement markings and signs. California DMV states that drivers should use designated entrances and exits rather than crossing double solid lines. 13

Always read the posted signs because HOV rules can vary by location and time.

Merging Onto a Highway

Merging onto a freeway or highway requires planning and careful observation.

California DMV explains that highway traffic already occupying the lanes has the right-of-way. When entering a highway, drivers should use the proper on-ramp lane, approach a speed appropriate for the traffic, use mirrors and signals, check blind spots, and merge into a sufficiently large gap when it is safe. 14

Do not stop on an on-ramp unless stopping is absolutely necessary. A smooth merge helps maintain traffic flow.

Before merging, determine where you need to go and choose an appropriate lane. Avoid trying to cross several lanes at the last moment.

Changing Several Lanes

If you need to move across several lanes, do not attempt to cross them all at once.

California DMV recommends changing lanes one at a time. Signal, check mirrors and blind spots, move into the next lane when safe, then repeat the process for the following lane.

This approach provides more opportunities to observe surrounding traffic and reduces the chance of moving into an occupied lane.

Exiting a Highway

Planning your exit early is an important part of safe freeway driving.

Know which exit you need and move into the appropriate lane before reaching the exit whenever traffic conditions allow.

California DMV advises signaling before exiting and checking blind spots when changing lanes. Once in the exit lane, adjust speed appropriately and remain within lane markings. 15

Never make a sudden last-second maneuver across multiple lanes to reach an exit.

Passing Other Vehicles

Passing requires sufficient visibility, space, and time.

Before passing, check the road ahead for curves, hills, intersections, approaching vehicles, bicycles, and other hazards.

A driver should never begin a passing maneuver without enough room to safely return to the original lane.

California DMV states that drivers should not pass when approaching a hill or curve where they cannot see whether traffic is approaching. The handbook also identifies several locations where passing is prohibited or unsafe, including certain intersections, bridges, tunnels, railroad crossings, and other hazardous areas. 16

Passing on the Right

Passing on the right is permitted only in certain circumstances.

California DMV identifies situations such as an open highway with two or more lanes traveling in the same direction, a vehicle ahead turning left when it is safe to pass on the right, and certain one-way streets. Drivers should never leave the paved or main-traveled roadway to pass another vehicle. 17

Always consider whether the maneuver is legal and safe before attempting it.

Being Passed

If another vehicle is passing you, maintain your lane and your speed rather than attempting to race the vehicle.

Allow the other vehicle to complete the passing maneuver safely.

A common mistake is accelerating when another driver is trying to pass. Safe driving requires maintaining predictable behavior and giving other road users adequate space.

Intersections and Right-of-Way

Right-of-way rules are another major California DMV test topic.

The vehicle that arrives first at an uncontrolled intersection generally has the right-of-way. When vehicles, pedestrians, or bicyclists arrive at the same time, California DMV explains that the vehicle, pedestrian, or bicyclist on your right should generally be given the right-of-way. 18

At a T intersection without STOP or YIELD signs, traffic traveling on the through road generally has the right-of-way.

When turning left, drivers must yield to pedestrians and approaching vehicles that are close enough to be dangerous.

When turning right, drivers must watch for pedestrians crossing the street and bicycles or motorcycles traveling alongside the vehicle.

Green Light Does Not Mean Ignore Others

A green traffic signal allows you to proceed when it is safe, but it does not mean you can ignore pedestrians or other road users.

California DMV explains that pedestrians have the right-of-way in applicable crossing situations. Drivers should look carefully before entering an intersection, even when the traffic signal permits movement. 19

Never enter an intersection if traffic is blocking your path and you cannot completely cross.

Roundabouts

A roundabout is an intersection where traffic travels around a central island in one direction.

When approaching a roundabout, slow down and yield to traffic already inside the roundabout.

Enter only when there is a sufficient gap. Follow the signs and lane markings and travel in the required direction.

California DMV states that drivers should not stop or pass within a roundabout. Signal when changing lanes or exiting, and if you miss your exit, continue around the roundabout until you reach it again. 20

Pedestrians at Intersections

Pedestrians require special attention at intersections.

California DMV states that pedestrians have the right-of-way in marked and unmarked crosswalks. When there is a limit line before a crosswalk, drivers should stop at the limit line and allow pedestrians to cross. 21

Always check for pedestrians before turning.

Pedestrians who are blind and use guide dogs or white canes have additional right-of-way protections. Drivers should be particularly careful when turning or backing near them.

Three-Second Following Distance

Following distance is important when changing lanes, merging, passing, and driving in normal traffic.

California DMV recommends using the three-second rule to help maintain a safe following distance. This gives the driver more time to react if the vehicle ahead suddenly slows or stops. 22

Increase your following distance when road conditions are poor or when additional reaction time is needed.

Avoiding Blind Spots

Do not remain unnecessarily in another driver's blind spot.

California DMV recommends maintaining awareness of vehicles on both sides of your vehicle and avoiding driving directly alongside another vehicle for extended periods. 23

When merging onto a freeway, make space for vehicles entering traffic when possible. Even when you have the legal right-of-way, maintaining awareness and adjusting safely can help prevent collisions.

Common DMV Test Mistakes

One common mistake is assuming that a turn signal automatically gives the driver the right to change lanes. It does not.

Another common mistake is crossing double solid white lines when changing lanes. Drivers should wait for an appropriate broken line or designated opening.

A third mistake is treating a green traffic light as permission to enter a blocked intersection.

Another mistake is failing to check blind spots before changing lanes or merging.

Drivers also sometimes misunderstand the difference between yellow and white lane markings. Yellow markings generally separate opposing traffic, while white markings generally separate traffic traveling in the same direction.

Final Study Review

Before taking the California DMV knowledge test, make sure you understand the major pavement markings and what they mean.

Review single and double yellow lines, broken yellow lines, single and double white lines, broken white lines, yield lines, bicycle lanes, HOV lanes, and center left-turn lanes.

Practice identifying when you can change lanes and when lane changes are prohibited.

Review right and left turns, right turns on red, red arrows, U-turn rules, and turning-lane procedures.

Study highway merging and exiting procedures.

Review passing rules and understand when passing can be unsafe or prohibited.

Study intersection right-of-way rules, roundabouts, pedestrians, bicycles, motorcycles, and other road users.

Most importantly, do not memorize isolated answers. Learn the reason behind each rule so you can apply it to a different question.

Conclusion

Road markings, lane changes, turns, merging, passing, and right-of-way are essential subjects for anyone