A large, lighted sign with a matrix of lights that displays arrows or chevrons to guide traffic, most often used on high-speed roadways to indicate lane closures or shifts.
What does a flashing "X" or four flashing corner lights on an arrow board signify?
This is a caution mode. It warns of a potential hazard ahead, such as slow-moving vehicles or workers on the shoulder. Slow down and proceed with care.
What is the "late merge" or "zipper merge" method?
In heavy traffic, drivers use both lanes until reaching the designated merge point, then take turns merging into the open lane. This reduces backups and maintains flow.
What is a pilot car?
A vehicle marked with a "PILOT CAR - FOLLOW ME" sign that leads a line of traffic through a complex or one-lane work zone. You must follow it and not pass it.
What is the difference between a detour and a lane shift?
A detour directs you onto a completely different road to get around a closure. A lane shift guides you to a different part of the same road surface, often into lanes normally used by opposing traffic.
What are rumble strips in a work zone?
Grooved or raised strips placed on the pavement ahead of a work zone to alert inattentive drivers through noise and vibration that they are approaching a changed condition.
You are in a work zone at night. What adjustments should you make?
Slow down even more than you would during the day, use your low beams to avoid blinding workers, and be extra cautious as visibility is reduced for both you and the workers.
An arrow board displays flashing arrows pointing to the left or right. What does this indicate?
It indicates a merge is required. You must prepare to merge into the adjacent lane in the direction the arrows are pointing.
What does a sequential chevron pattern on an arrow board signify?
This pattern indicates a lane shift. The road ahead curves, but no lanes are lost. Steer in the direction indicated by the chevrons.
You see a rectangular orange sign that says "DETOUR" with an arrow. What must you do?
You must exit the current roadway and follow the direction of the arrow to begin the temporary, alternative route around the closed portion of the road.
