Oklahoma CAR DMV Practice Test 22

Warning signs prepare drivers for upcoming road conditions and hazards and are usually yellow with black markings. This sign alerts drivers to potential traffic merging from the right. Drivers should prepare to allow the traffic to merge safely.

This sign warns that a steep downgrade is ahead on the road. Drivers should check their brakes.

While it is not advisable to drive in fog, if you must drive in foggy conditions, you should drive with the headlights set on dim or use fog lights.

Large vehicles can cause wind gusts with a force great enough to cause direction changes in smaller vehicles. Drivers of small vehicles should be prepared to take proper corrective steering action when approaching or passing large vehicles that are moving at or near maximum speeds.

If an oncoming driver fails to dim their high beams, you should avoid looking directly at the headlights. Instead, look toward the right edge of your lane and watch the oncoming vehicle out of the corner of your eye.

You should always slow down before entering a curve. You may not be able to see hazards ahead and braking in a curve may cause your vehicle to skid.

Yellow lines are used in the center of the road to separate lanes of traffic moving in opposite directions.

Drivers must always yield the right-of-way to a pedestrian when the pedestrian is a blind person who is using a white cane or guide dog.

The only way to remove the impairing effects of alcohol is to give the body time to remove it from the body. Drinking coffee, physical activity, or taking a cold shower will not speed up this process. It takes about one hour to cancel the effects of one drink.

If two vehicles arrive at the same time to an uncontrolled intersection, the driver on the left must yield to the driver on the right. The driver on the left may then proceed when it is safe to do so.

Pentagonal signs mean you are approaching a school zone and/or school crossing. When you see these signs, be alert and prepare to stop.

A single broken line indicates that drivers may cross from either lane to change lanes. Dashed yellow lines alongside solid yellow lines indicate that passing is permitted from the lane next to the broken line, but not from the lane next to the solid line. Only change lanes when it is safe to do so.

You must drive more slowly than usual when there is heavy traffic or bad weather. However, if you block the normal and reasonable movement of traffic by driving too slowly, you may be cited. You should match the speed of traffic, unless the speed of traffic exceeds the legal speed limit.

When a school bus is flashing its red lights and has its stop arm extended, motorists must come to a full stop until the lights are turned off, the stop arm is withdrawn, and the bus begins moving again.

This sign indicates that there is a Y intersection ahead. You must bear either to the right or to the left.

When being tailgated, create extra space in front of your vehicle and do not brake suddenly. Slow down gradually or merge into another lane to prevent a collision with the tailgater.

When parking facing uphill on a street that has a curb, set your parking brake and turn your steering wheel away from the curb. This way, if your vehicle starts to roll, it will roll into the curb.

You should always turn from the lane that is closest to the direction you want to go. Turn into the lane closest to your previous lane.

Downward-facing triangular signs mean drivers must yield. When approaching a yield sign, slow down to a speed that is reasonable for existing conditions and stop if necessary. If you must stop, do so at a marked stop line, if it exists.

Alcohol reduces your reaction time, reduces your ability to see clearly, changes your judgment of speed and distances, reduces your ability to recover from the glare of headlights, and often reduces your inhibitions and makes you more likely to take risks.