Center turn lanes and HOV lanes

By the end of this topic you can

• You can recognize a two-way left turn lane from its markings and signs.
• You can enter a center turn lane at the right moment and turn left from it.
• You can read an HOV sign and work out whether your vehicle may use the lane.
• You can enter and leave an HOV lane only where it is allowed.

What you need to know and understand

• A two-way left turn lane is marked by a solid yellow line and a broken yellow line on each side, often with white turn arrows pointing both ways.
• The center lane is for turning left or making allowed U-turns, never for passing or ordinary travel.
• How far you may travel in it varies: California allows up to 200 feet; Oregon says to enter just before your turn.
• HOV lanes are marked with a white diamond symbol and signs showing the minimum number of occupants, such as 2+ or 3+.
• HOV rules may apply only at certain hours; the sign tells you when.
• In California, do not cross double solid lines to enter or leave a carpool lane; use the marked openings.
• Motorcycles and buses are often allowed in HOV lanes, but other exceptions vary by state. California's clean-air vehicle decal access for solo drivers ended on September 30, 2025.

Turning left from a center turn lane

1. Check mirrors and signal left well before your turn.
2. Check the center lane ahead for vehicles coming the other way that may be using it too.
3. Move into the center lane close to where you plan to turn, within your state's limit.
4. Stop in the lane if needed and wait for a safe gap in oncoming traffic.
5. Make your turn, watching for pedestrians on the street you enter.

What a center lane is not for

Some states let drivers use the center lane to turn left out of a driveway and then merge into traffic. Others do not. Learn your own state's rule before you rely on it.

• Not for passing slower traffic.
• Not a merge lane for driving long distances before joining traffic, unless your state allows it.
• Not a place to wait for long with your car angled into oncoming lanes.
• Not a parking or loading area.

Reading an HOV or carpool lane sign

An HOV sign shows the number of people needed, such as HOV 2+ meaning the driver and at least one passenger. It may also list days and hours, outside of which anyone may use the lane. A white diamond painted in the lane shows it is restricted.

Some HOV lanes are separated by double solid lines with marked entry and exit points. Crossing those lines is illegal in states such as California. Some carpool lanes are now express or toll lanes that solo drivers can use for a fee, often with an electronic tag. Check the signs and your state rules before using one. Do not rely on an old clean-air or electric-car decal: in California that solo-driver access ended in 2025, so you now need the posted number of people or must pay the toll.

Common mistakes

• Driving a long way in the center lane. Enter close to your turn and follow your state's distance rule.
• Using the center lane to pass. It is only for turning.
• Entering an HOV lane during restricted hours with too few people. Count everyone, including yourself.
• Crossing double solid lines into or out of an HOV lane. Wait for the marked opening.
• Forgetting that oncoming drivers use the same center lane. Look ahead before entering.

Test yourself: Center turn lanes and HOV lanes

Answer each question, then read the explanation. Questions come in a random order each time.

Go deeper

• Center Turn Lane Rules
• HOV and Carpool Lanes Explained
• How Toll Roads Work in the US