A triangle-shaped sign pointing downward is always a yield sign. Slow down and be ready to stop if necessary when approaching it.

Yellow warning signs with black details are used to alert drivers to road conditions ahead. This one signals a steep downhill slope is approaching. Reduce your speed and be prepared to shift into a lower gear to maintain control and prevent brake failure.

When merging onto an interstate, find a safe gap, signal, and speed up to match traffic. Merge only when it’s safe, and don’t assume others will move for you.

Stay alert for changes in traffic conditions when on the freeway. Be ready for merging vehicles and changing road conditions.

Orange signs mark construction zones. Drive cautiously and be aware of possible hazards.

When merging onto a freeway, try to match the speed of traffic to enter smoothly.

Long vehicles, like trucks, have wider turning paths. Be cautious when they swing wide during a right turn.

Drivers should act responsibly and share the road respectfully. If you come across an aggressive driver, don’t engage—simply let them pass to stay safe.

Large trucks take much longer to stop than smaller vehicles. A truck traveling at 55 mph needs about 800 feet to stop, while a car needs about 400 feet.

A warning sign with this symbol means the divided highway ends soon. Be ready to change lanes or adjust your position.

Keep both hands on opposite sides of the steering wheel—this is the safest and most comfortable position, especially at higher speeds and during quick maneuvers.

A five-sided yellow or yellow-green sign alerts drivers to either a school zone or school crossing.

Before changing lanes, it’s essential to check behind you. Look over your shoulder to make sure you aren’t blocking any vehicles in the lane you plan to enter. Also, check to ensure no other drivers are trying to move into the same space from a different lane.

A one-way or “do not enter” sign means traffic is coming toward you. If you see this sign facing you, you must turn around immediately.

If a traffic signal is out, treat the intersection as a four-way stop. Stop completely, check for traffic, and yield the right-of-way before entering. Follow directions from law enforcement if present.

This sign notifies drivers that bicycles may be crossing the roadway—use extra caution in these areas.

Using a mobile phone while driving is a distraction and significantly increases the likelihood of being involved in a traffic accident.

This sign indicates that there is a pedestrian crosswalk.

When you approach a yield sign, slow down and yield the right-of-way to any vehicles or pedestrians crossing your path. You must stop if necessary before proceeding.

Even if a crosswalk isn’t marked, you still need to let pedestrians go first if they’re on your side and there are no signals.

You can finish a left turn after the light changes to red if you were already in the intersection—just yield first.

If visibility is poor due to darkness or weather, give yourself more space behind the vehicle in front of you. This extra distance gives you more time to react if something happens unexpectedly.

It is against Illinois law to drive on state roads with any amount of illegal drugs or intoxicating substances in your system. For drivers under 21, being found with any alcohol in their system after a traffic stop and citation will lead to a three-month suspension of their license.

A round yellow sign indicates that there is a railroad crossing ahead.

When approaching a stop sign, stop completely at the marked stop line. If there’s no line, stop before the crosswalk. If neither is present, stop before entering the intersection.

This sign is displayed on slow-moving vehicles.

This sign warns that two lanes will soon become one, so drivers need to either shift lanes or let others in, depending on their position.

Always give right-of-way to visually impaired pedestrians using a white cane or guide dog, regardless of traffic conditions.

This sign informs drivers that they are leaving a divided roadway and approaching a two-way highway.

The sign warns of a series of curves starting with a right turn followed by a left—drivers should reduce speed to navigate safely.

The stop sign, which has a unique eight-sided shape, means you must come to a full stop. Only continue when it’s clear and safe to do so.

An eight-sided sign always signals a stop. You must fully stop at the stop line; if none, stop before the crosswalk. If there’s no crosswalk, stop at a point where you can see oncoming traffic safely.

Driving fast on wet roads can make your tires lose grip, causing them to skim over the water—a dangerous condition known as hydroplaning. To avoid it, slow down in the rain.

When turning left, you must yield to oncoming traffic and pedestrians. Complete the turn only when it’s safe and traffic signals permit.

When entering a construction zone, slow down and stay alert. Obey all signs and be ready to stop. Watch for workers and changes in road conditions.