Texas DMV Road Rules — 28 Questions with Answers

Blinking your brake lights or turning on the hazard flashers lets the people behind you know early that traffic is stopping for a crash ahead, which gives them room to slow down. These signals warn of danger or an unexpected slowdown; they are not a way to thank another driver or something to use while reversing out of a parking spot.

Tip Hazard flashers are for warning others of a sudden danger, not for excusing double-parking or for ordinary driving.

High speeds and heavy traffic on major highways leave little time to respond, so you need to stay focused, scan the road and mirrors continually, and be ready for hazards such as stalled vehicles, debris, or sudden slowdowns.

A stop sign, a red signal, and a stop order from an officer directing traffic each require a full stop. The same duty applies in other cases too, such as a school bus with flashing red lights or a train approaching a railroad crossing.

Cutting across a parking lot, gas station, or other property to avoid a sign or signal is illegal. The only exception is when a police officer directs traffic that way.

Tight or curving roads, intersections, railroad crossings, and wet or slippery pavement all leave less room for error. A lower speed buys you reaction time and cuts the distance you need to stop.

Your headlights must be on during the period that starts a half hour after sunset and ends a half hour before sunrise, and also whenever rain, fog, or other weather makes it hard to see people and vehicles ahead.

After a blowout, hold the steering wheel firmly, take your foot off the accelerator, and keep the car going straight while it loses speed on its own. Braking hard can make you lose control, so stop only after you have eased off the road to a safe spot.

Total stopping distance is the ground you cover while reacting plus the distance needed to brake, which depends on speed, brakes, tires, and the road surface. Darkness can make hazards harder to spot, but the clock itself does not change how far the vehicle needs to stop.

Tip When judging how quickly you can stop, think about speed, reaction time, brakes, tires, and pavement, not the hour.

Most states require a parallel-parked car to have its wheels within 12 inches of the curb, and some allow up to 18, so staying within 12 inches keeps you legal in either case. A wider gap leaves the car sticking out into the travel lane, where it becomes a hazard to passing traffic.

Tip A gap of roughly 6 to 12 inches keeps you within the limit while protecting your tires from the curb.

Set the front wheels so that the curb would stop the car if it started to roll: angle them toward the curb if the car points downhill and away from it if the car points uphill. Apply the parking brake every time.

Tip Downhill means wheels toward the curb; uphill with a curb means wheels away from it.

When a crash cannot be avoided, the goal is to reduce the force of the impact. Something that yields absorbs energy better than a rigid object, a stationary object is less violent to hit than an oncoming vehicle, and a glancing contact is far less dangerous than a direct, head-on hit.

If a school bus stops on a two-lane road with its red lights flashing, traffic approaching from either direction has to stop and stay put until the lights go off and the bus moves on. Simply slowing down is not sufficient, including when the bus is on the opposite side of the road.

Tip Drivers on the far side of a highway split by a physical divider, such as a raised median, are not required to stop.

You must not pass or go around a vehicle that has stopped for people at a crosswalk, because it may be hiding a child who is stepping into the road. Obeying the school speed limit and letting children cross first are things you must do, not things you must avoid.

Water on the pavement makes stopping take longer, so open up a gap of at least 4 to 5 seconds behind the vehicle ahead. Brake, steer and accelerate gently to avoid skidding.

Tip On wet pavement, plan on about twice your usual following distance so you have room to stop.

As soon as you hear a siren or notice red or blue lights flashing, give the emergency vehicle the right-of-way by moving to the right edge of the road and stopping until it goes by. You must do this no matter what other drivers are doing.

Flashing red lights mean the bus is picking up or dropping off children, so traffic behind it must halt and remain stopped until the lights shut off and the stop arm retracts. Slowing down or passing instead is illegal and dangerous. How far back you must stop depends on the state; where the law gives a distance, it is usually 10 to 20 feet.

To indicate a right turn, stick your left arm through the driver's window and bend it up at the elbow so your hand points toward the sky. A straight, extended arm signals a left turn, while an arm bent downward signals that you are slowing down or stopping.

When wipers quit during rain or snow, your view is nearly gone. Slow down, and if looking out the open driver's window is your only means of seeing ahead, do so; brake and leave the road at the first safe chance. Once stopped, put on your hazard flashers and wait until the weather clears or the wipers are repaired.

Before you back up, change lanes or brake suddenly, check the traffic behind you with your mirrors and by turning your head. Look over your shoulder through the rear window when backing, and check your blind spot before moving into another lane. These are the moments when a collision with someone behind you is most likely: backing takes you toward whatever is back there, and if you change lanes or brake hard, a vehicle coming up behind you may have no room to avoid you.

The Texas Driver Handbook calls for at least 2 seconds of following distance at 30 mph or less and at least 4 seconds above 30 mph. Since the blue car is going faster than 30 mph, its driver should keep at least 4 seconds and add more in bad weather.

Headlights are required whenever poor light or bad weather keeps you from seeing people and vehicles 1,000 feet ahead. Using them then helps you see the road and helps other drivers see you.

When vehicles arrive together, each driver yields to the vehicle on the right, and a left-turning driver also yields to oncoming traffic going straight. That puts the yellow car first, the blue car (which has the yellow car on its right) second, and the left-turning truck, which has the blue car on its right, last.

Slippery pavement gives your tires less traction, so lose speed before a curve or intersection rather than while you are in it. Speeding into a curve, or waiting until you are already descending a hill to downshift, makes a skid more likely.

No mirror shows the blind spots shaded red in the picture, so a signal and a mirror check must be followed by a quick turn of the head toward the lane you want. Change lanes only when you are sure it is clear.

Emergency vehicles may stop or turn without warning, and others may be following, so the law requires you to stay back at least 500 feet once one has passed. Trailing it closely is dangerous, and after it goes by you may resume normal driving while keeping that distance.

No one number is safe in every situation. Choose your speed based on the weather, the road surface, how far you can see and how heavy traffic is, and remember that driving under the limit can still be too fast in poor conditions.

The headlight requirement begins 30 minutes after sunset, when fading daylight makes it harder for others to see you. Also turn them on at any hour when rain, snow, or fog limits visibility.

The law requires headlights starting 30 minutes after the sun sets and ending 30 minutes before it rises, which means that in the morning you can turn them off when sunrise is half an hour away. Leave them on longer when rain, fog, or snow limits visibility.