Montana Permit Test cheat sheet

Sign shapes carry meaning: octagon = STOP, inverted triangle = YIELD, pennant = No Passing Zone, diamond = warning, round = railroad advance warning, five-sided pentagon = school zone/crossing, vertical rectangle = regulatory, horizontal rectangle = guide/information.

Sign colors: red = stop/prohibit/yield, white = regulatory, yellow = warning, fluorescent yellow-green = school/pedestrian/bicycle warnings, orange = construction/work zone, green = guide/distance, blue = services, brown = recreation/cultural, fluorescent pink = incident management.

Flashing red signal = same as a STOP sign: come to a full stop, yield, then proceed when safe. Flashing yellow = slow down and proceed with caution; it does not require a stop.

A steady yellow light means the signal is about to turn red: stop if you can do so safely, otherwise clear the intersection with caution. It does not mean accelerate.

Solid yellow center line(s): passing is prohibited for traffic on your side when the line is on your side; two solid yellow lines mean no passing in either direction. Broken yellow means passing allowed when safe.

Solid white lines mark the right edge of the roadway or separate lanes traveling the same direction; a solid white line between same-direction lanes discourages but does not always prohibit lane changes. Broken white lines separate same-direction lanes and may be crossed when safe.

Double solid white lines separate lanes of traffic moving in the same direction and crossing them is prohibited.

A red X over a lane means the lane is closed to your direction; a green arrow over a lane means the lane is open. A yellow X means the lane is about to close or must be cleared.

Pavement markings supplement signs: a solid white stop line marks where to stop at a signal or sign; crosswalk markings and yield lines (row of triangles) show where pedestrians cross and where yielding occurs.

At an uncontrolled intersection (no signs or signals), the vehicle arriving first has the right-of-way; if vehicles arrive at approximately the same time, the driver on the left must yield to the driver on the right.

A vehicle turning left must yield to oncoming traffic going straight or turning right, and to pedestrians in the crosswalk. A driver entering a roadway from a driveway, alley, or private road must yield to traffic already on the roadway.

At a four-way stop, first to arrive proceeds first; simultaneous arrivals yield to the right. A driver turning left yields to a driver going straight through from the opposite direction.

Montana's basic speed rule requires driving at a speed reasonable and prudent for conditions; posted limits are maximums for ideal conditions, and lower speeds are required in rain, snow, ice, fog, or heavy traffic.

Unless otherwise posted, the Montana daytime maximum on an interstate highway is 80 mph; nighttime limits are lower than daytime limits on many rural highways, and posted signs always control.

A driver must signal a turn or lane change continuously for at least the last 100 feet before turning; signals must also be given before stopping or slowing suddenly.

Montana requires seat belts for the driver and all passengers, and children under 6 years old or under 60 pounds must be restrained in an approved child safety seat. A child under 2 must be in a rear-facing seat.

Montana law requires drivers to yield to pedestrians in a crosswalk, and a driver may not pass a vehicle stopped at a marked crosswalk to allow a pedestrian to cross. Pedestrians must obey signals and use crosswalks where provided.

Emergency vehicles approaching with lights and siren have the right-of-way: pull to the right edge of the roadway and stop until they pass. Do not follow closer than 500 feet behind a fire truck responding to an alarm.

Following distance: use the three-second rule in good conditions; increase to four or more seconds at night, in rain, or when following motorcycles, trucks, or vehicles that block your view. In snow or ice, allow at least double the normal gap.

A truck's blind spots (No-Zones) extend up to 20 feet in front, 30 feet behind, and along both sides; if you cannot see the driver's mirror, the driver cannot see you. Trucks need extra room to turn right, so never pass on the right side of a turning truck.

Passing a large truck or bus requires more time and distance; complete the pass promptly and do not linger alongside. When a truck passes you, maintain speed and steer steadily to avoid being pushed or pulled by air turbulence.

Hydroplaning begins at speeds as low as 35 mph on wet pavement; if you feel the steering go light, ease off the accelerator, do not brake hard, and hold the wheel straight until traction returns.

In fog, smoke, or heavy snow, use low-beam headlights (high beams reflect back and reduce visibility), slow down, and increase following distance. If visibility is too poor, pull well off the roadway and stop with hazard lights on.

Montana's Move Over law requires drivers to slow down and, when safe, move to a lane not adjacent to a stopped emergency, tow, or maintenance vehicle displaying flashing lights. If a lane change is not possible, reduce speed substantially.

Motorcyclists are entitled to a full lane; do not share a lane with a motorcycle. Give motorcycles extra following distance because they can stop faster than cars and are harder to see at intersections.

Bicyclists must ride with traffic and obey the same rules; give them at least three feet of clearance when passing where practical, and check for cyclists before opening a car door or turning across a bike lane.

Railroad crossings: slow down, look both ways, and never stop on the tracks. If gates are down or lights flash, stop and wait; if your vehicle stalls on the tracks, get everyone out and move away from the tracks before calling for help.

Montana's per se limit is a blood alcohol concentration (BAC) of 0.08% for drivers 21 and older; a commercial driver is limited to 0.04%, and a driver under 21 is subject to a zero-tolerance standard.

A DUI can be charged even below 0.08% if the driver's ability is impaired by alcohol, drugs, or a combination; impairment is judged by driving behavior and field sobriety tests, not only by the number.

Implied consent: by driving in Montana, a driver agrees to submit to a breath, blood, or urine test when lawfully requested; refusing a test can result in license suspension independent of any DUI conviction.

Alcohol affects judgment, reaction time, and coordination before the driver notices impairment; the only reliable way to sober up is time, since the body metabolizes alcohol at roughly one standard drink per hour and coffee, food, or cold air do not speed it up.

Prescription and over-the-counter drugs can impair driving, and combining them with alcohol multiplies the effect; read warning labels and do not drive when a medication causes drowsiness or slowed reaction.

Montana law prohibits driving with an open container of alcohol in the passenger area of a vehicle; penalties increase for repeat offenses, high BAC, or a child in the vehicle.

Driver responsibility: carry proof of insurance and a valid license, report a crash involving injury, death, or property damage above the statutory threshold, and never leave the scene of a crash involving injury.

Fatigue is a major impairment: drowsy driving slows reaction time and judgment similar to alcohol. Stop and rest when you have trouble keeping your eyes open, drift between lanes, or cannot remember the last few miles.

Sign shapes encode meaning: octagon = STOP, inverted triangle = YIELD, diamond = warning, pennant = no passing zone, round = railroad advance warning, five-sided = school zone.

Sign colors encode meaning: red = stop/prohibit, yellow = warning, fluorescent yellow-green = school/pedestrian, orange = construction, green = guide, blue = services, brown = recreation.

A flashing red signal is treated as a stop sign; a flashing yellow signal means slow down and proceed with caution.

A steady yellow light warns that red is coming: stop if you can do so safely rather than speeding up.

A solid yellow center line on your side means no passing; a broken yellow line means passing is allowed when safe.

A red X over a lane means that lane is closed to your direction; a green arrow means the lane is open.

A solid white stop line marks where to stop at a sign or signal; yield lines are a row of triangles.

Double solid white lines separate same-direction lanes and may not be crossed.

At an uncontrolled intersection, the first vehicle to arrive goes first; if two arrive together, the driver on the left yields to the driver on the right.

A left-turning driver must yield to oncoming traffic going straight or turning right, and to pedestrians in the crosswalk.

A driver entering a roadway from a driveway, alley, or private road must yield to traffic already on the roadway.

Montana's basic speed rule requires a speed reasonable and prudent for conditions; posted limits are maximums for ideal conditions only.

Signal a turn continuously for at least the last 100 feet before turning.

Montana requires seat belts for the driver and all passengers, and approved child safety seats for children under 6 or under 60 pounds.

Emergency vehicles with lights and siren have the right-of-way: pull to the right edge and stop until they pass.

Do not follow a fire truck responding to an alarm closer than 500 feet.

Use the three-second following rule in good conditions; increase the gap at night, in rain, or behind trucks and motorcycles that block your view.

Truck No-Zones extend roughly 20 feet in front, 30 feet behind, and along both sides; if you cannot see the truck's mirror, the driver cannot see you.

Never pass a truck on the right when it may be turning right; large vehicles need extra room and swing wide.

Hydroplaning can begin at 35 mph on wet pavement; ease off the accelerator and hold the wheel straight instead of braking hard.

In fog or heavy snow, use low-beam headlights, slow down, and increase following distance; high beams reflect back and reduce visibility.

Montana's Move Over law requires slowing down and moving over when safe for stopped emergency, tow, or maintenance vehicles with flashing lights.

Motorcyclists are entitled to a full lane; do not share a lane, and allow extra following distance.

Give bicyclists at least three feet of clearance when passing where practical, and check for them before turning or opening a door.

Never stop on railroad tracks; if gates are down or lights flash, stop and wait until it is safe to cross.

Montana's per se limit is 0.08% BAC for drivers 21 and older; commercial drivers are limited to 0.04%, and drivers under 21 face a zero-tolerance standard.

A DUI can be charged below 0.08% when alcohol, drugs, or a combination impair the driver's ability.

Implied consent means a driver agrees to a breath, blood, or urine test when lawfully requested; refusal can lead to license suspension.

The body metabolizes alcohol at roughly one standard drink per hour; coffee, food, and cold air do not sober a person up.

Prescription and over-the-counter drugs can impair driving, and combining them with alcohol multiplies the effect.

Montana prohibits an open container of alcohol in the passenger area of a vehicle.

Carry a valid license and proof of insurance, and never leave the scene of a crash involving injury.

Drowsy driving slows reaction time and judgment similar to alcohol; stop and rest when you cannot keep your eyes open or drift between lanes.

Octagon = STOP, inverted triangle = YIELD, diamond = warning, pennant = no passing zone, round = railroad advance warning, five-sided = school zone.

Red = stop or prohibit, yellow = warning, fluorescent yellow-green = school and pedestrian, orange = construction, green = guide, blue = services, brown = recreation.

A flashing red signal works like a stop sign; a flashing yellow signal means slow down and proceed with caution.

A steady yellow light means the signal is about to turn red: stop if you can do so safely.

A solid yellow center line on your side prohibits passing; a broken yellow line allows passing when safe.

A red X over a lane means the lane is closed to your direction; a green arrow means the lane is open.

A solid white stop line marks where to stop; yield lines are a row of triangles.

Double solid white lines separate same-direction lanes and may not be crossed.

At an uncontrolled intersection, the first vehicle to arrive goes first; if two arrive together, the driver on the left yields to the driver on the right.

A left-turning driver must yield to oncoming traffic going straight or turning right, and to pedestrians in the crosswalk.

A driver entering a roadway from a driveway, alley, or private road must yield to traffic already on the roadway.

Montana's basic speed rule requires a speed reasonable and prudent for conditions; posted limits are maximums for ideal conditions only.

Signal a turn continuously for at least the last 100 feet before turning.

Montana requires seat belts for the driver and all passengers, and approved child safety seats for children under 6 or under 60 pounds.

Emergency vehicles with lights and siren have the right-of-way: pull to the right edge and stop until they pass.

Do not follow a fire truck responding to an alarm closer than 500 feet.

Use the three-second following rule in good conditions; increase the gap at night, in rain, or behind trucks and motorcycles that block your view.

Truck No-Zones extend roughly 20 feet in front, 30 feet behind, and along both sides; if you cannot see the truck's mirror, the driver cannot see you.

Never pass a truck on the right when it may be turning right; large vehicles need extra room and swing wide.

Hydroplaning can begin at 35 mph on wet pavement; ease off the accelerator and hold the wheel straight instead of braking hard.

In fog or heavy snow, use low-beam headlights, slow down, and increase following distance; high beams reflect back and reduce visibility.

Montana's Move Over law requires slowing down and moving over when safe for stopped emergency, tow, or maintenance vehicles with flashing lights.

Motorcyclists are entitled to a full lane; do not share a lane, and allow extra following distance.

Give bicyclists at least three feet of clearance when passing where practical, and check for them before turning or opening a door.

Never stop on railroad tracks; if gates are down or lights flash, stop and wait until it is safe to cross.

Montana's per se limit is 0.08% BAC for drivers 21 and older; commercial drivers are limited to 0.04%, and drivers under 21 face a zero-tolerance standard.

A DUI can be charged below 0.08% when alcohol, drugs, or a combination impair the driver's ability.

Implied consent means a driver agrees to a breath, blood, or urine test when lawfully requested; refusal can lead to license suspension.

The body metabolizes alcohol at roughly one standard drink per hour; coffee, food, and cold air do not sober a person up.

Prescription and over-the-counter drugs can impair driving, and combining them with alcohol multiplies the effect.

Montana prohibits an open container of alcohol in the passenger area of a vehicle.

Carry a valid license and proof of insurance, and never leave the scene of a crash involving injury.

Drowsy driving slows reaction time and judgment similar to alcohol; stop and rest when you cannot keep your eyes open or drift between lanes.

Octagon = STOP, inverted triangle = YIELD, diamond = warning, pennant = no passing zone, round = railroad advance warning, five-sided = school zone.

Red = stop or prohibit, yellow = warning, fluorescent yellow-green = school and pedestrian, orange = construction, green = guide, blue = services, brown = recreation.

A flashing red signal works like a stop sign; a flashing yellow signal means slow down and proceed with caution.

A steady yellow light means the signal is about to turn red: stop if you can do so safely.

A solid yellow center line on your side prohibits passing; a broken yellow line allows passing when safe.

A red X over a lane means the lane is closed to your direction; a green arrow means the lane is open.

A solid white stop line marks where to stop; yield lines are a row of triangles.

Double solid white lines separate same-direction lanes and may not be crossed.

At an uncontrolled intersection, the first vehicle to arrive goes first; if two arrive together, the driver on the left yields to the driver on the right.

A left-turning driver must yield to oncoming traffic going straight or turning right, and to pedestrians in the crosswalk.

A driver entering a roadway from a driveway, alley, or private road must yield to traffic already on the roadway.

Montana's basic speed rule requires a speed reasonable and prudent for conditions; posted limits are maximums for ideal conditions only.

Signal a turn continuously for at least the last 100 feet before turning.

Montana requires seat belts for the driver and all passengers, and approved child safety seats for children under 6 or under 60 pounds.

Emergency vehicles with lights and siren have the right-of-way: pull to the right edge and stop until they pass.

Do not follow a fire truck responding to an alarm closer than 500 feet.

Use the three-second following rule in good conditions; increase the gap at night, in rain, or behind trucks and motorcycles that block your view.

Truck No-Zones extend roughly 20 feet in front, 30 feet behind, and along both sides; if you cannot see the truck's mirror, the driver cannot see you.

Never pass a truck on the right when it may be turning right; large vehicles need extra room and swing wide.

Hydroplaning can begin at 35 mph on wet pavement; ease off the accelerator and hold the wheel straight instead of braking hard.

In fog or heavy snow, use low-beam headlights, slow down, and increase following distance; high beams reflect back and reduce visibility.

Montana's Move Over law requires slowing down and moving over when safe for stopped emergency, tow, or maintenance vehicles with flashing lights.

Motorcyclists are entitled to a full lane; do not share a lane, and allow extra following distance.

Give bicyclists at least three feet of clearance when passing where practical, and check for them before turning or opening a door.

Never stop on railroad tracks; if gates are down or lights flash, stop and wait until it is safe to cross.

Montana's per se limit is 0.08% BAC for drivers 21 and older; commercial drivers are limited to 0.04%, and drivers under 21 face a zero-tolerance standard.

A DUI can be charged below 0.08% when alcohol, drugs, or a combination impair the driver's ability.

Implied consent means a driver agrees to a breath, blood, or urine test when lawfully requested; refusal can lead to license suspension.

The body metabolizes alcohol at roughly one standard drink per hour; coffee, food, and cold air do not sober a person up.

Prescription and over-the-counter drugs can impair driving, and combining them with alcohol multiplies the effect.

Montana prohibits an open container of alcohol in the passenger area of a vehicle.

Carry a valid license and proof of insurance, and never leave the scene of a crash involving injury.

Drowsy driving slows reaction time and judgment similar to alcohol; stop and rest when you cannot keep your eyes open or drift between lanes.

Octagon = STOP, inverted triangle = YIELD, diamond = warning, pennant = no passing zone, round = railroad advance warning, five-sided = school zone.

Red = stop or prohibit, yellow = warning, fluorescent yellow-green = school and pedestrian, orange = construction, green = guide, blue = services, brown = recreation.

A flashing red signal works like a stop sign; a flashing yellow signal means slow down and proceed with caution.

A steady yellow light means the signal is about to turn red: stop if you can do so safely.

A solid yellow center line on your side prohibits passing; a broken yellow line allows passing when safe.

A red X over a lane means the lane is closed to your direction; a green arrow means the lane is open.

A solid white stop line marks where to stop; yield lines are a row of triangles.

Double solid white lines separate same-direction lanes and may not be crossed.

At an uncontrolled intersection, the first vehicle to arrive goes first; if two arrive together, the driver on the left yields to the driver on the right.

A left-turning driver must yield to oncoming traffic going straight or turning right, and to pedestrians in the crosswalk.

A driver entering a roadway from a driveway, alley, or private road must yield to traffic already on the roadway.

Montana's basic speed rule requires a speed reasonable and prudent for conditions; posted limits are maximums for ideal conditions only.

Signal a turn continuously for at least the last 100 feet before turning.

Montana requires seat belts for the driver and all passengers, and approved child safety seats for children under 6 or under 60 pounds.

Emergency vehicles with lights and siren have the right-of-way: pull to the right edge and stop until they pass.

Do not follow a fire truck responding to an alarm closer than 500 feet.

Use the three-second following rule in good conditions; increase the gap at night, in rain, or behind trucks and motorcycles that block your view.

Truck No-Zones extend roughly 20 feet in front, 30 feet behind, and along both sides; if you cannot see the truck's mirror, the driver cannot see you.

Never pass a truck on the right when it may be turning right; large vehicles need extra room and swing wide.

Hydroplaning can begin at 35 mph on wet pavement; ease off the accelerator and hold the wheel straight instead of braking hard.

In fog or heavy snow, use low-beam headlights, slow down, and increase following distance; high beams reflect back and reduce visibility.

Montana's Move Over law requires slowing down and moving over when safe for stopped emergency, tow, or maintenance vehicles with flashing lights.

Motorcyclists are entitled to a full lane; do not share a lane, and allow extra following distance.

Give bicyclists at least three feet of clearance when passing where practical, and check for them before turning or opening a door.

Never stop on railroad tracks; if gates are down or lights flash, stop and wait until it is safe to cross.

Montana's per se limit is 0.08% BAC for drivers 21 and older; commercial drivers are limited to 0.04%, and drivers under 21 face a zero-tolerance standard.

A DUI can be charged below 0.08% when alcohol, drugs, or a combination impair the driver's ability.

Implied consent means a driver agrees to a breath, blood, or urine test when lawfully requested; refusal can lead to license suspension.

The body metabolizes alcohol at roughly one standard drink per hour; coffee, food, and cold air do not sober a person up.

Prescription and over-the-counter drugs can impair driving, and combining them with alcohol multiplies the effect.

Montana prohibits an open container of alcohol in the passenger area of a vehicle.

Carry a valid license and proof of insurance, and never leave the scene of a crash involving injury.

Drowsy driving slows reaction time and judgment similar to alcohol; stop and rest when you cannot keep your eyes open or drift between lanes.

Octagon = STOP, inverted triangle = YIELD, diamond = warning, pennant = no passing zone, round = railroad advance warning, five-sided = school zone.

Red = stop or prohibit, yellow = warning, fluorescent yellow-green = school and pedestrian, orange = construction, green = guide, blue = services, brown = recreation.

A flashing red signal works like a stop sign; a flashing yellow signal means slow down and proceed with caution.

A steady yellow light means the signal is about to turn red: stop if you can do so safely.

A solid yellow center line on your side prohibits passing; a broken yellow line allows passing when safe.

A red X over a lane means the lane is closed to your direction; a green arrow means the lane is open.

A solid white stop line marks where to stop; yield lines are a row of triangles.

Double solid white lines separate same-direction lanes and may not be crossed.

At an uncontrolled intersection, the first vehicle to arrive goes first; if two arrive together, the driver on the left yields to the driver on the right.

A left-turning driver must yield to oncoming traffic going straight or turning right, and to pedestrians in the crosswalk.

A driver entering a roadway from a driveway, alley, or private road must yield to traffic already on the roadway.

Montana's basic speed rule requires a speed reasonable and prudent for conditions; posted limits are maximums for ideal conditions only.

Signal a turn continuously for at least the last 100 feet before turning.

Montana requires seat belts for the driver and all passengers, and approved child safety seats for children under 6 or under 60 pounds.

Emergency vehicles with lights and siren have the right-of-way: pull to the right edge and stop until they pass.

Do not follow a fire truck responding to an alarm closer than 500 feet.

Use the three-second following rule in good conditions; increase the gap at night, in rain, or behind trucks and motorcycles that block your view.

Truck No-Zones extend roughly 20 feet in front, 30 feet behind, and along both sides; if you cannot see the truck's mirror, the driver cannot see you.

Never pass a truck on the right when it may be turning right; large vehicles need extra room and swing wide.

Hydroplaning can begin at 35 mph on wet pavement; ease off the accelerator and hold the wheel straight instead of braking hard.

In fog or heavy snow, use low-beam headlights, slow down, and increase following distance; high beams reflect back and reduce visibility.

Montana's Move Over law requires slowing down and moving over when safe for stopped emergency, tow, or maintenance vehicles with flashing lights.

Motorcyclists are entitled to a full lane; do not share a lane, and allow extra following distance.

Give bicyclists at least three feet of clearance when passing where practical, and check for them before turning or opening a door.

Never stop on railroad tracks; if gates are down or lights flash, stop and wait until it is safe to cross.

Montana's per se limit is 0.08% BAC for drivers 21 and older; commercial drivers are limited to 0.04%, and drivers under 21 face a zero-tolerance standard.

A DUI can be charged below 0.08% when alcohol, drugs, or a combination impair the driver's ability.

Implied consent means a driver agrees to a breath, blood, or urine test when lawfully requested; refusal can lead to license suspension.

The body metabolizes alcohol at roughly one standard drink per hour; coffee, food, and cold air do not sober a person up.

Prescription and over-the-counter drugs can impair driving, and combining them with alcohol multiplies the effect.

Montana prohibits an open container of alcohol in the passenger area of a vehicle.

Carry a valid license and proof of insurance, and never leave the scene of a crash involving injury.

Drowsy driving slows reaction time and judgment similar to alcohol; stop and rest when you cannot keep your eyes open or drift between lanes.

Octagon = STOP, inverted triangle = YIELD, diamond = warning, pennant = no passing zone, round = railroad advance warning, five-sided = school zone.

Red = stop or prohibit, yellow = warning, fluorescent yellow-green = school and pedestrian, orange = construction, green = guide, blue = services, brown = recreation.

A flashing red signal works like a stop sign; a flashing yellow signal means slow down and proceed with caution.

A steady yellow light means the signal is about to turn red: stop if you can do so safely.

A solid yellow center line on your side prohibits passing; a broken yellow line allows passing when safe.

A red X over a lane means the lane is closed to your direction; a green arrow means the lane is open.

A solid white stop line marks where to stop; yield lines are a row of triangles.

Double solid white lines separate same-direction lanes and may not be crossed.

At an uncontrolled intersection, the first vehicle to arrive goes first; if two arrive together, the driver on the left yields to the driver on the right.

A left-turning driver must yield to oncoming traffic going straight or turning right, and to pedestrians in the crosswalk.

A driver entering a roadway from a driveway, alley, or private road must yield to traffic already on the roadway.

Montana's basic speed rule requires a speed reasonable and prudent for conditions; posted limits are maximums for ideal conditions only.

Signal a turn continuously for at least the last 100 feet before turning.

Montana requires seat belts for the driver and all passengers, and approved child safety seats for children under 6 or under 60 pounds.

Emergency vehicles with lights and siren have the right-of-way: pull to the right edge and stop until they pass.

Do not follow a fire truck responding to an alarm closer than 500 feet.

Use the three-second following rule in good conditions; increase the gap at night, in rain, or behind trucks and motorcycles that block your view.

Truck No-Zones extend roughly 20 feet in front, 30 feet behind, and along both sides; if you cannot see the truck's mirror, the driver cannot see you.

Never pass a truck on the right when it may be turning right; large vehicles need extra room and swing wide.

Hydroplaning can begin at 35 mph on wet pavement; ease off the accelerator and hold the wheel straight instead of braking hard.

In fog or heavy snow, use low-beam headlights, slow down, and increase following distance; high beams reflect back and reduce visibility.

Montana's Move Over law requires slowing down and moving over when safe for stopped emergency, tow, or maintenance vehicles with flashing lights.

Motorcyclists are entitled to a full lane; do not share a lane, and allow extra following distance.

Give bicyclists at least three feet of clearance when passing where practical, and check for them before turning or opening a door.

Never stop on railroad tracks; if gates are down or lights flash, stop and wait until it is safe to cross.

Montana's per se limit is 0.08% BAC for drivers 21 and older; commercial drivers are limited to 0.04%, and drivers under 21 face a zero-tolerance standard.

A DUI can be charged below 0.08% when alcohol, drugs, or a combination impair the driver's ability.

Implied consent means a driver agrees to a breath, blood, or urine test when lawfully requested; refusal can lead to license suspension.

The body metabolizes alcohol at roughly one standard drink per hour; coffee, food, and cold air do not sober a person up.

Prescription and over-the-counter drugs can impair driving, and combining them with alcohol multiplies the effect.

Montana prohibits an open container of alcohol in the passenger area of a vehicle.

Carry a valid license and proof of insurance, and never leave the scene of a crash involving injury.

Drowsy driving slows reaction time and judgment similar to alcohol; stop and rest when you cannot keep your eyes open or drift between lanes.

Octagon = STOP, inverted triangle = YIELD, diamond = warning, pennant = no passing zone, round = railroad advance warning, five-sided = school zone.

Red = stop or prohibit, yellow = warning, fluorescent yellow-green = school and pedestrian, orange = construction, green = guide, blue = services, brown = recreation.

A flashing red signal works like a stop sign; a flashing yellow signal means slow down and proceed with caution.

A steady yellow light means the signal is about to turn red: stop if you can do so safely.

A solid yellow center line on your side prohibits passing; a broken yellow line allows passing when safe.

A red X over a lane means the lane is closed to your direction; a green arrow means the lane is open.

A solid white stop line marks where to stop; yield lines are a row of triangles.

Double solid white lines separate same-direction lanes and may not be crossed.

At an uncontrolled intersection, the first vehicle to arrive goes first; if two arrive together, the driver on the left yields to the driver on the right.

A left-turning driver must yield to oncoming traffic going straight or turning right, and to pedestrians in the crosswalk.

A driver entering a roadway from a driveway, alley, or private road must yield to traffic already on the roadway.

Montana's basic speed rule requires a speed reasonable and prudent for conditions; posted limits are maximums for ideal conditions only.

Signal a turn continuously for at least the last 100 feet before turning.

Montana requires seat belts for the driver and all passengers, and approved child safety seats for children under 6 or under 60 pounds.

Emergency vehicles with lights and siren have the right-of-way: pull to the right edge and stop until they pass.

Do not follow a fire truck responding to an alarm closer than 500 feet.

Use the three-second following rule in good conditions; increase the gap at night, in rain, or behind trucks and motorcycles that block your view.

Truck No-Zones extend roughly 20 feet in front, 30 feet behind, and along both sides; if you cannot see the truck's mirror, the driver cannot see you.

Never pass a truck on the right when it may be turning right; large vehicles need extra room and swing wide.

Hydroplaning can begin at 35 mph on wet pavement; ease off the accelerator and hold the wheel straight instead of braking hard.

In fog or heavy snow, use low-beam headlights, slow down, and increase following distance; high beams reflect back and reduce visibility.

Montana's Move Over law requires slowing down and moving over when safe for stopped emergency, tow, or maintenance vehicles with flashing lights.

Motorcyclists are entitled to a full lane; do not share a lane, and allow extra following distance.

Give bicyclists at least three feet of clearance when passing where practical, and check for them before turning or opening a door.

Never stop on railroad tracks; if gates are down or lights flash, stop and wait until it is safe to cross.

Montana's per se limit is 0.08% BAC for drivers 21 and older; commercial drivers are limited to 0.04%, and drivers under 21 face a zero-tolerance standard.

A DUI can be charged below 0.08% when alcohol, drugs, or a combination impair the driver's ability.

Implied consent means a driver agrees to a breath, blood, or urine test when lawfully requested; refusal can lead to license suspension.

The body metabolizes alcohol at roughly one standard drink per hour; coffee, food, and cold air do not sober a person up.

Prescription and over-the-counter drugs can impair driving, and combining them with alcohol multiplies the effect.

Montana prohibits an open container of alcohol in the passenger area of a vehicle.

Carry a valid license and proof of insurance, and never leave the scene of a crash involving injury.

Drowsy driving slows reaction time and judgment similar to alcohol; stop and rest when you cannot keep your eyes open or drift between lanes.

Octagon = STOP, inverted triangle = YIELD, diamond = warning, pennant = no passing zone, round = railroad advance warning, five-sided = school zone.

Red = stop or prohibit, yellow = warning, fluorescent yellow-green = school and pedestrian, orange = construction, green = guide, blue = services, brown = recreation.

A flashing red signal works like a stop sign; a flashing yellow signal means slow down and proceed with caution.

A steady yellow light means the signal is about to turn red: stop if you can do so safely.

A solid yellow center line on your side prohibits passing; a broken yellow line allows passing when safe.

A red X over a lane means the lane is closed to your direction; a green arrow means the lane is open.

A solid white stop line marks where to stop; yield lines are a row of triangles.

Double solid white lines separate same-direction lanes and may not be crossed.

At an uncontrolled intersection, the first vehicle to arrive goes first; if two arrive together, the driver on the left yields to the driver on the right.

A left-turning driver must yield to oncoming traffic going straight or turning right, and to pedestrians in the crosswalk.

A driver entering a roadway from a driveway, alley, or private road must yield to traffic already on the roadway.

Montana's basic speed rule requires a speed reasonable and prudent for conditions; posted limits are maximums for ideal conditions only.

Signal a turn continuously for at least the last 100 feet before turning.

Montana requires seat belts for the driver and all passengers, and approved child safety seats for children under 6 or under 60 pounds.

Emergency vehicles with lights and siren have the right-of-way: pull to the right edge and stop until they pass.

Do not follow a fire truck responding to an alarm closer than 500 feet.

Use the three-second following rule in good conditions; increase the gap at night, in rain, or behind trucks and motorcycles that block your view.

Truck No-Zones extend roughly 20 feet in front, 30 feet behind, and along both sides; if you cannot see the truck's mirror, the driver cannot see you.

Never pass a truck on the right when it may be turning right; large vehicles need extra room and swing wide.

Hydroplaning can begin at 35 mph on wet pavement; ease off the accelerator and hold the wheel straight instead of braking hard.

In fog or heavy snow, use low-beam headlights, slow down, and increase following distance; high beams reflect back and reduce visibility.

Montana's Move Over law requires slowing down and moving over when safe for stopped emergency, tow, or maintenance vehicles with flashing lights.

Motorcyclists are entitled to a full lane; do not share a lane, and allow extra following distance.

Give bicyclists at least three feet of clearance when passing where practical, and check for them before turning or opening a door.

Never stop on railroad tracks; if gates are down or lights flash, stop and wait until it is safe to cross.

Montana's per se limit is 0.08% BAC for drivers 21 and older; commercial drivers are limited to 0.04%, and drivers under 21 face a zero-tolerance standard.

A DUI can be charged below 0.08% when alcohol, drugs, or a combination impair the driver's ability.

Implied consent means a driver agrees to a breath, blood, or urine test when lawfully requested; refusal can lead to license suspension.

The body metabolizes alcohol at roughly one standard drink per hour; coffee, food, and cold air do not sober a person up.

Prescription and over-the-counter drugs can impair driving, and combining them with alcohol multiplies the effect.

Montana prohibits an open container of alcohol in the passenger area of a vehicle.

Carry a valid license and proof of insurance, and never leave the scene of a crash involving injury.

Drowsy driving slows reaction time and judgment similar to alcohol; stop and rest when you cannot keep your eyes open or drift between lanes.