DMV考试中的道路标志

The octagonal red stop sign is one of the most recognized signs in the world. It requires drivers to make a full stop and check for traffic and pedestrians before continuing.

The triangular yield sign tells drivers they must let other traffic go first. You may proceed without stopping only if there is no conflicting traffic.

This sign is placed at mid-block crosswalks and uncontrolled intersections to remind drivers that pedestrians in the crosswalk have the right-of-way.

This fluorescent yellow-green sign is placed in the roadway on a flexible post at crosswalks to increase visibility of pedestrian crossing areas.

Speed limit signs display the maximum allowable speed for that section of road. Drivers should reduce speed below the posted limit in poor weather or road conditions.

Minimum speed signs are posted on highways where slow-moving traffic could create a hazard. Vehicles unable to maintain the minimum speed should not use the road.

This sign prohibits making a right turn. It is commonly posted where right turns would create a safety hazard or conflict with traffic flow.

This sign prohibits making a left turn. It is often used at intersections where left turns would disrupt traffic or create dangerous conditions.

This sign tells drivers they cannot make a U-turn. U-turn restrictions are common on divided highways, near intersections, and in areas with limited visibility.

An alternative no U-turn sign with a red circle and slash over a U-turn arrow symbol, clearly indicating that U-turns are prohibited.

This sign indicates the lane is designated for straight-through traffic only. Drivers must continue straight through the intersection.

Lane use control signs indicate the permitted movements from specific lanes. Arrows show whether a lane is for turning, going straight, or both.

This sign overrides the default rule allowing right turns on red. Drivers must wait for a green signal before making any turn.

This sign marks the beginning of a no-passing zone where limited sight distance or other conditions make passing dangerous.

This sign marks the end of a no-passing zone. Passing is permitted but drivers should still check for oncoming traffic and ensure adequate sight distance.

This sign reminds slower-moving vehicles to move to the right lane, allowing faster traffic to pass on the left.

This sign alerts drivers that a dedicated right turn lane is starting and they must check for and yield to bicyclists before entering the turn lane.

This sign requires trucks and other heavy vehicles to travel in the right lane to improve traffic flow and safety.

The keep right sign directs drivers to pass to the right side of an obstruction or median.

The keep left sign directs drivers to pass to the left side of an obstruction or median.

This sign informs drivers that bicyclists have the right to use the full lane and should not be forced to ride at the edge of the road.

The Do Not Enter sign is placed at the exit end of one-way streets, freeway ramps, and other restricted areas. Entering is illegal and creates a head-on collision risk.

The Wrong Way sign reinforces the Do Not Enter sign and is placed further along the restricted road. If you see this sign, you are driving into oncoming traffic.

This sign restricts truck traffic on roads where large vehicles could cause structural damage, create safety hazards, or disturb residential areas.

This sign prohibits bicycle traffic, typically on highways, freeways, or other roads where cycling would be unsafe.

This one-way sign with a left-pointing arrow indicates the direction of traffic flow on a one-way street.

This one-way sign with a right-pointing arrow indicates the direction of traffic flow on a one-way street.

This sign alerts drivers that the highway ahead has a physical median or barrier separating opposing traffic.

This sign restricts parking during specific hours. Always check the posted times and days before leaving your vehicle.

The blue wheelchair symbol indicates a parking space reserved for people with disabilities. Unauthorized use is illegal and subject to fines.

Van accessible spaces provide additional width and an access aisle for wheelchair-equipped vans to deploy their ramps or lifts.

The No Parking sign prohibits vehicles from being parked in the designated area.

No Standing is stricter than No Parking — you cannot stop at the curb for any reason except to obey a traffic signal or to avoid an emergency.

This sign prohibits pedestrian access, commonly seen on freeways and controlled-access highways.

This sign shows drivers exactly where to stop when the light is red, usually at a marked stop line.

This sign prohibits drivers from stopping in the intersection, which would block cross traffic when the light changes.

This sign prohibits making any turn while the traffic signal is red.

This sign reminds left-turning drivers that a green light does not give them the right-of-way over oncoming vehicles.

This sign reminds turning drivers that pedestrians crossing with the signal have the right-of-way.

The Road Closed sign indicates the road is impassable ahead, often due to construction, flooding, or an emergency.

Weight limit signs protect roads and bridges from damage by heavy vehicles. Overweight vehicles must use an alternate route.

The circular railroad crossing advance warning sign alerts drivers to an upcoming railroad crossing.

This diamond-shaped sign warns of a sharp turn. The arrow shows the direction of the turn.

This sign warns of a gradual curve in the road ahead. The arrow indicates the curve direction.

A reverse turn sign warns of an S-shaped road configuration where you first turn one way, then immediately the other.

Similar to a reverse turn but with gentler curves. Expect the road to change direction twice in succession.

This sign warns of multiple curves in succession. Reduce your speed and be prepared for a winding stretch of road.

The large arrow sign marks a sharp change in road direction, placed on the outside of curves to guide drivers safely.

This sign is placed at the end of a median or obstacle where traffic can pass on either side.

This sign warns of a full intersection ahead where roads cross. Be prepared for vehicles entering from the left and right.

This sign warns that a road joins from the right. Be alert for vehicles entering or crossing from that direction.

This sign warns that a road joins from the left. Be alert for vehicles entering or crossing from that direction.

This sign warns that your road ends at an intersecting road, forming a T shape. Prepare to stop and turn.

This advance warning sign tells drivers to prepare for a stop sign that may not be visible until close range.

This advance warning sign alerts drivers to a yield sign ahead, giving them time to adjust speed.

This sign warns of a traffic signal that may be hard to see in advance, giving drivers time to prepare.

The merge sign warns that traffic from another road will join your lane ahead.

This sign warns that your lane is ending and you must merge into the remaining lane.

The added lane sign indicates the road is gaining a lane so entering traffic has its own lane.

This sign warns that the roadway narrows, reducing available driving space.

This sign warns of a bridge that is narrower than the road. Slow down and be prepared to yield to oncoming traffic.

This sign indicates a single-lane bridge where opposing traffic must take turns crossing.

This sign warns drivers that the road will split into separated lanes. Keep right of the median or barrier.

This sign warns that the median separating opposing traffic is ending and you will encounter head-on traffic.

This sign warns that the road changes from one-way to two-way traffic.

This sign warns of a steep downgrade where brake overheating may occur. Use a lower gear to help control speed.

Truck escape ramps are built into steep downhill grades for vehicles that lose braking ability. They use deep gravel or sand to stop runaway vehicles.

This sign warns of a raised area in the road surface that could cause loss of vehicle control at higher speeds.

This sign warns of a sudden depression in the road surface. At high speeds, a dip can cause loss of control or vehicle damage.

This sign warns that the road transitions from a paved surface to an unpaved surface. Reduce speed and maintain control.

This sign warns of road conditions that can be especially slippery during rain. Increase following distance.

A drop-off between the pavement and shoulder can cause drivers to lose control if they drift off the road.

Bridges lose heat from both top and bottom, causing them to freeze faster than regular roads. Slow down and avoid sudden braking.

This sign warns of a steep shoulder drop-off that could be dangerous if a vehicle leaves the travel lane.

This sign warns that the road is in a low-lying area prone to flooding. If water is present, turn around — don't drown.

This circular yellow sign with an X and RR warns of an upcoming railroad crossing.

The X-shaped crossbuck is placed at the railroad crossing itself and means yield to trains.

This sign warns drivers to watch for bicyclists who may be crossing the road or riding alongside.

This sign warns of a designated pedestrian crossing area ahead.

This sign warns of an area with a high concentration of deer. Vehicle-deer collisions are most common during early morning and evening hours.

This sign warns of areas where cattle may wander onto the roadway, typically in rural or agricultural areas near open range.

This sign warns of an area where tractors and other farm machinery may share the road, traveling much slower than normal traffic.

This sign warns of areas where horses and riders may cross the roadway. Slow down to avoid startling animals.

Emergency vehicles may enter the roadway suddenly. Always yield to fire trucks with lights and sirens.

This sign warns drivers to be alert for wheelchair users or persons with mobility impairments who may cross more slowly.

This sign warns of an area where trucks commonly enter or cross the roadway.

This sign warns of an area with both bicycle and pedestrian traffic.

The low clearance sign displays the maximum height that can pass under an overpass or bridge.

The dead end sign lets drivers know the road terminates ahead with no through traffic.

A no outlet sign indicates a neighborhood or road network that has only one entrance/exit. Unlike a dead end, there may be side streets but none connect to another through road.

This sign warns drivers to be especially cautious because children may be playing near the road.

Speed humps are raised pavement sections designed to slow traffic in residential areas. They are wider and less abrupt than speed bumps.

The fluorescent yellow-green pentagon-shaped school sign marks the beginning of a school zone where reduced speed limits and increased caution are required.

This sign warns of a marked crosswalk near a school where children cross the road.

This sign warns of an upcoming school bus stop where children may be loading or unloading from a school bus.

This sign shows a reduced speed limit (typically 15-25 mph) that applies when the attached flashing beacons are activated during school arrival and dismissal times.

This sign marks the end of a school zone where the reduced speed limit no longer applies.

The triangular pennant-shaped sign marks the beginning of a no-passing zone, placed on the left side of the road.

The orange diamond-shaped sign warns of construction activity ahead. Fines are often doubled in work zones.

This sign indicates a temporary alternate route around a road closure or construction zone.

In construction zones, one lane may be closed, requiring traffic from both directions to share a single lane.

This sign warns that one or more lanes are closed due to construction. Begin merging early to avoid delays.

This sign warns that a construction worker is directing traffic with a flag or stop/slow paddle.

This sign shows a worker digging, warning that road workers are present in the area.

This sign warns of construction equipment that may be moving slowly or blocking lanes.

This sign warns that the shoulder is being repaired or is unusable due to construction activity.

Green destination signs show the direction and names of cities, towns, and other destinations along the route.

Distance signs show how many miles to upcoming destinations, helping drivers plan stops and turns.

Green exit signs indicate the distance to an upcoming highway exit and the destinations it serves.

Exit number signs are placed above or beside the exit ramp, corresponding to the mile marker on the highway.

Blue rest area signs indicate an upcoming roadside facility where drivers can stop to rest, use restrooms, and stretch.

The blue Hospital sign with a white H directs drivers to the nearest hospital, critical information in emergencies.

This blue service sign with a tent symbol indicates that camping facilities are available near the current exit.

This sign indicates that services at the upcoming exit include handicapped-accessible facilities.

The blue gas pump sign directs drivers to the nearest fuel station, especially useful on long highway stretches.

This blue service sign with a fork and knife indicates restaurants or food service near the upcoming exit.

This blue service sign with a bed symbol indicates overnight accommodations are available nearby.

The blue sign with an 'i' symbol indicates a visitor center or tourist information office.

This newer service sign indicates the availability of EV charging facilities, increasingly common on major highways.

This sign with the Star of Life symbol indicates that emergency medical services, such as an ambulance station or urgent care, are accessible.

The red, white, and blue shield-shaped sign identifies Interstate highways. Even-numbered interstates run east-west; odd-numbered run north-south.

US Route markers are black and white shield-shaped signs identifying federal highways that predate the Interstate system.

State route markers vary by state but typically show the route number. They identify roads maintained by the state highway department.

County route markers identify roads maintained by county governments. They are typically blue pentagon-shaped signs.