California Driver's Examination Study Guide: Rules of the Road & Driving Regulations
Alcohol, Drugs, and Substance Regulations
Blood Alcohol Concentration (BAC) Limits for Adults:
For drivers or older, it is illegal to drive with a blood alcohol concentration (BAC) of (eight-hundredths of one percent) or higher.
Driving while under the influence of alcohol is both illegal and dangerous.
Driving Under the Influence of Impairing Medications and Drugs:
Driving under the influence of any medication or substance that impairs the ability to drive safely is permitted under no circumstances.
Impairing substances include alcohol, prescription medications, over-the-counter (OTC) medications, and illegal drugs.
Implied Consent Law in California:
By driving in California, drivers automatically give consent to take a chemical test for the alcohol content of their blood, breath, or urine whenever arrested for suspicion of driving under the influence of alcohol and/or drugs.
Smoking Restrictions in Vehicles with Minors:
Smoking inside a vehicle when a person younger than is present is illegal at all times.
Speed Laws and Railroad Crossings
California's Basic Speed Law:
The "Basic Speed Law" states that a driver may never drive faster than is safe for current road or weather conditions.
Example: Driving at in a zone during dense fog can result in a citation for driving "too fast for conditions," even though the speed is below the posted limit.
Railroad Crossing Speed Limits:
Within of a railroad crossing where a driver cannot see down the tracks in both directions, the speed limit is if there are no warning devices.
Drivers may drive faster than if the crossing is controlled by gates, a warning signal, or a flagger.
Lane Usage, Passing, and Blind Spots
Driving Motor Vehicles in Bike Lanes:
Drivers may enter a bicycle lane no more than before making a right turn into a corner or driveway.
Motor vehicles are prohibited from entering a bicycle lane at any other time.
Passing on Roadway Shoulders:
Driving off the paved or main-traveled portion of the road and onto the shoulder to pass another vehicle is prohibited under no circumstances.
Safely Returning to a Lane After Passing:
When passing another vehicle, it is safe to return to the original driving lane when both of the passed vehicle's headlights can be seen in the rearview mirror.
This ensures the vehicle is not dangerously close to the passed vehicle.
Yellow Line Lane Markings:
Yellow lines separate lanes of traffic moving in opposite directions.
When a solid yellow line is next to a broken yellow line, vehicles located next to the broken line are permitted to pass.
Checking Vehicle Blind Spots:
Blind spots are defined as areas around the vehicle that cannot be seen using mirrors alone.
To check blind spots properly, drivers must look directly over their shoulders.
Pedestrian Right-of-Way Regulations
Pedestrians Crossing Roadways (Unmarked Crosswalks):
If a pedestrian is crossing a driver's lane and there is no marked crosswalk, the driver must stop and let the pedestrian finish crossing.
Drivers must always yield the right-of-way to pedestrians in the roadway, regardless of whether a marked crosswalk exists.
Pedestrians with Guide Dogs or White Canes:
Drivers must yield the right-of-way at all times to pedestrians who use guide dogs or white canes (with or without a red tip).
Freeway Operations and Large Vehicle Safety
Following Distance Behind Large Trucks:
Drivers should follow farther behind a large truck than they would when following a standard passenger vehicle.
Extra following distance is required because trucks have significantly larger blind spots.
Space Cushion in Front of Large Trucks:
Extra space in front of a large truck is required to allow the truck driver adequate distance to stop the vehicle.
Because of their larger mass, trucks take longer to stop than passenger cars traveling at identical speeds.
Drivers must never pull directly in front of a truck and then slow down or stop.
Freeway Merging Protocols:
Merging Vehicles: Vehicles merging onto a freeway should be driving at or near the speed of traffic on the freeway.
On-Freeway Traffic: Drivers already on the freeway should make room for merging traffic whenever traffic conditions permit.
Traffic Signals, Night Driving, and Distraction Prevention
Non-Functioning Traffic Signals:
If a traffic signal light is not working and no lights are showing, drivers must stop, then proceed when safe.
The non-functioning intersection must be treated as if controlled by stop signs in all directions.
Cell Phone Usage and Mobile Distractions:
Drivers who do not have a hands-free device must let incoming calls go to voicemail.
For minors, it is illegal to use any cell phone while driving, except during a genuine emergency.
Even with hands-free devices, it is recommended that drivers let calls go to voicemail to avoid mental distractions.
Night Driving Safety:
When driving at night on a dimly lit street, drivers should drive slowly enough to stop within the area illuminated by their headlights.
Nighttime visibility is significantly reduced compared to daytime, making it impossible to see as far ahead.
Visual Scanning and Hazard Prevention:
To avoid last-minute driving maneuvers, drivers should scan the road ahead of their vehicle.
Looking ahead to where the vehicle will be in allows drivers to detect potential hazards before reaching them.
Parking Regulations and Incident Management
Parking Uphill on Two-Way Roads Without a Curb:
When parking uphill or downhill on a two-way road without a curb, turn the front wheels to the right, toward the side of the road.
Positioning the wheels toward the side of the road ensures the vehicle will roll away from the center of the road if the brakes fail.
Parallel Parking Standards:
When parking parallel to a curb on a level street, both the front and back wheels must be parallel with and within of the curb.
Minor Intersection Collisions:
After a minor collision at an intersection where there are no injuries or fatalities and minimal vehicle damage, drivers should move their vehicle out of the traffic lane if possible and safe to do so.