DMV

Reference

Say the road words plainly.

30 terms used across the course. Each definition links back to the official California handbook section used to verify it.

Showing 30 terms

BAC Alcohol and drugs

Blood alcohol concentration.

A measure of alcohol in a person's blood. A legal threshold is not a promise that a person is safe to drive.

California Driver Handbook, Alcohol and Drugs Verified 2026-08-17
basic speed law Speed and stopping distance

The duty to choose a speed that is safe for current conditions.

A posted limit is a ceiling, not a target. Traffic, weather, visibility, surface, and road width can require a lower speed.

California Driver Handbook, Safe Driving Verified 2026-08-17
blind intersection Speed and stopping distance

An intersection where something blocks a driver's view of approaching traffic.

Buildings, trees, parked vehicles, or terrain can hide a road user. Approach slowly enough to stop within the space you can see.

California Driver Handbook, Laws and Rules of the Road Verified 2026-08-17
braking distance Speed and stopping distance

The distance a vehicle travels after braking begins.

Speed, tire grip, brakes, slope, and road surface all change it. It is only one part of total stopping distance.

California Driver Handbook, Safe Driving Verified 2026-08-17
center turn lane Lanes, turns, and passing

A shared lane reserved for left turns from either direction.

It is a setup and turning space, not a normal travel lane or a place to pass a queue.

California Driver Handbook, Navigating the Roads Verified 2026-08-17
controlled intersection Right-of-way

An intersection governed by signs or signals.

The control assigns movement, but every road user still has a duty to avoid a collision when possible.

California Driver Handbook, Laws and Rules of the Road Verified 2026-08-17
crosswalk Right-of-way

The part of a roadway set aside for people crossing on foot.

A crosswalk may be marked or unmarked at an intersection. Drivers and pedestrians each have safety duties.

California Driver Handbook, Laws and Rules of the Road Verified 2026-08-17
defensive driving Difficult conditions

Driving to preserve space and time before another road user makes a mistake.

It combines scanning, speed choice, escape space, communication, and a willingness to yield even when another person is wrong.

California Driver Handbook, Safe Driving Verified 2026-08-17
financial responsibility Insurance and collisions

The legal ability to cover losses caused by a vehicle collision.

Most drivers meet the requirement with liability insurance and must be able to show valid evidence of coverage.

California Driver Handbook, Financial Responsibility, Insurance, and Collisions Verified 2026-08-17
following distance Speed and stopping distance

The space and time between your vehicle and the one ahead.

Measure it in time so the gap grows naturally with speed. Add more time when visibility, traction, traffic, or your vehicle increases risk.

California Driver Handbook, Safe Driving Verified 2026-08-17
gore area Freeways

The painted wedge that separates a freeway lane from an entrance or exit ramp.

It is not a travel lane. Plan the exit early instead of crossing the marked area at the last moment.

California Driver Handbook, Navigating the Roads Verified 2026-08-17
guide sign Signs, signals, and markings

A sign that directs road users to routes, destinations, or services.

Its color and layout help distinguish navigation information from warnings and commands.

California Driver Handbook, Navigating the Roads Verified 2026-08-17
HOV lane Freeways

A lane reserved for qualifying high-occupancy or otherwise authorized vehicles.

Signs and pavement markings state when the restriction applies and which vehicles may enter.

California Driver Handbook, Navigating the Roads Verified 2026-08-17
hydroplaning Difficult conditions

Loss of tire contact with the road when water builds beneath the tread.

Steering and braking authority can fade quickly. Reduce speed before deep water and make smooth control inputs.

California Driver Handbook, Safe Driving Verified 2026-08-17
limit line Signs, signals, and markings

A solid white line showing where a vehicle must stop.

It is placed before the crosswalk or intersection area so a stopped vehicle leaves the crossing clear.

California Driver Handbook, Navigating the Roads Verified 2026-08-17
no-zone Sharing the road

An area around a large vehicle where its driver has limited visibility or maneuvering room.

The largest danger areas are close behind, beside the cab, and in the wide path of a turn. Avoid lingering there.

California Driver Handbook, Safe Driving Verified 2026-08-17
perception distance Speed and stopping distance

The distance traveled while a driver notices and understands a hazard.

Attention, visibility, and expectation affect this phase before any physical response begins.

California Driver Handbook, Safe Driving Verified 2026-08-17
provisional license Licensing and the test

A license for a young driver that carries temporary restrictions.

The restrictions reduce high-risk exposure while the driver gains experience. Exceptions depend on the exact rule and documentation.

California Driver Handbook, Getting an Instruction Permit and Driver's License Verified 2026-08-17
reaction distance Speed and stopping distance

The distance traveled while a driver responds after recognizing a hazard.

Fatigue, distraction, impairment, surprise, and speed can all increase the ground covered before braking begins.

California Driver Handbook, Safe Driving Verified 2026-08-17
regulatory sign Signs, signals, and markings

A sign that states a traffic law or required action.

Stop, yield, movement restrictions, and posted limits belong to this family.

California Driver Handbook, Navigating the Roads Verified 2026-08-17
right-of-way Right-of-way

The rules that determine who should proceed first in a conflict area.

Priority is not permission to cause a crash. A driver must still watch, communicate, and yield when safety requires it.

California Driver Handbook, Laws and Rules of the Road Verified 2026-08-17
roundabout Right-of-way

A circular intersection where entering traffic yields to traffic already circulating.

Choose the correct lane before entry, watch for people crossing, and signal before leaving when safe.

California Driver Handbook, Navigating the Roads Verified 2026-08-17
shoulder Lanes, turns, and passing

The strip beside a travel lane that is not a normal through lane.

It may provide emergency space and room for some road users, but its legal uses depend on the situation.

California Driver Handbook, Navigating the Roads Verified 2026-08-17
stopping distance Speed and stopping distance

The total distance needed to notice a hazard, react, and stop the vehicle.

It combines human response with vehicle braking. More speed expands every part of the problem.

California Driver Handbook, Safe Driving Verified 2026-08-17
traffic break Freeways

A deliberate slowing pattern used by law enforcement to create space ahead.

Do not pass the patrol vehicle. Reduce speed smoothly and follow its direction until normal traffic resumes.

California Driver Handbook, Safe Driving Verified 2026-08-17
uncontrolled intersection Right-of-way

An intersection without signs or signals assigning movement.

Slow early, scan every approach, apply arrival and yielding rules, and do not assume another driver has seen you.

California Driver Handbook, Laws and Rules of the Road Verified 2026-08-17
unprotected left turn Right-of-way

A left turn made without a dedicated signal phase stopping opposing traffic.

The turning driver needs a legal, visible gap and must yield to conflicting road users before crossing their path.

California Driver Handbook, Laws and Rules of the Road Verified 2026-08-17
warning sign Signs, signals, and markings

A sign that alerts road users to a condition or hazard ahead.

Its shape and color help a driver prepare before the hazard becomes immediate.

California Driver Handbook, Navigating the Roads Verified 2026-08-17
yield Right-of-way

To give another road user the space and time needed to proceed safely.

Yielding may require slowing or stopping. The safe action depends on the conflict, not on reaching the line first.

California Driver Handbook, Laws and Rules of the Road Verified 2026-08-17