Georgia CDL — General Knowledge practice
Georgia CDL — General Knowledge: Road Signs practice test
Learn the shapes, colors, and meanings of regulatory, warning, and guide signs — from stop and yield to construction and school-zone signs.
Content reviewed against official driver handbooks · August 12, 2026
11 questions · pass with 9 correct. You get instant feedback and an explanation after every answer.
Study questions with answers
11 sample Road Signs questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
Show all 11 questions with answers
1. A sign posting a low clearance height, such as 12 ft 6 in, tells a truck driver to:
Correct answer: Not enter if the vehicle is taller than the height shown
A low-clearance sign warns of the height of a bridge or overpass. If your loaded vehicle is taller than the posted height, do not enter; find another route to avoid striking the structure.
2. On steep mountain downgrades you will see signs marking the location of escape ramps. These ramps exist to:
Correct answer: Bring a vehicle whose brakes have given out to a safe halt
An escape ramp uses a long bed of soft, loose material, often paired with an upgrade, to bring a runaway truck to a halt without hurting the driver or passengers. Learn where the ramps are before you drive a grade.
3. A yellow warning sign showing a truck on a downhill grade with a percentage, such as 6%, tells you that:
Correct answer: A steep downgrade is ahead; slow down and select a low gear
The sign warns of a steep downgrade ahead. Slow down, check your brakes, and shift into a lower gear before you start down so the engine helps control your speed.
4. A small sign mounted below a railroad crossbuck reads '3 TRACKS'. What information is that sign giving you?
Correct answer: How many sets of rails you will have to drive over at this crossing
When a road crosses more than one set of rails, a plate under the crossbuck states how many sets there are. Knowing the count matters because a train on one set can hide a second train on another.
5. The white X-shaped crossbuck sign standing at a railroad crossing means that you must:
Correct answer: Give the right of way to any approaching train
A crossbuck marks the grade crossing itself and carries the same legal weight as a yield sign: the train always has the right of way, so a driver must give way to it.
6. You are driving a bus and reach a railroad crossing posted with an 'Exempt' sign. At this crossing you are:
Correct answer: Not required to stop, but you must slow and check for other vehicles
A crossing signed exempt, or one marked abandoned, relieves a bus driver of the mandatory stop. You are still expected to ease off the speed and check carefully for other traffic before rolling across.
Source: Georgia CDL Manual — Railroad-highway Crossings Stops
7. A speed limit sign is posted on a freeway exit ramp. For the driver of a loaded tractor-trailer, that posted number:
Correct answer: May still be too fast for a large or heavily loaded vehicle
Ramp speeds are set with cars in mind. A tall, heavy commercial vehicle may roll over at a speed a car handles easily, so slow well below the posted figure before you reach the curved portion of the ramp.
8. A red, eight-sided (octagonal) sign always means:
Correct answer: Come to a complete stop
A red octagon is always a stop sign. You must come to a complete stop at the stop line or crosswalk and go only when the way is clear and it is safe.
9. A round yellow sign with a black X and two R letters appears on the road ahead of you. This sign is telling you to:
Correct answer: Reduce speed, look and listen for a train, and be ready to stop before the rails
That circular black-on-yellow sign is the advance warning for a public railroad crossing. It warns you to ease off the speed, watch and listen for a train, and be ready to halt before the rails if one is coming.
10. You come up behind a vehicle displaying a reflective triangular emblem with an orange middle and a red border. That emblem tells you the vehicle:
Correct answer: Cannot keep up with the normal flow of traffic
The triangular orange-and-red emblem is the slow-moving vehicle symbol, carried by machinery such as tractors and mopeds that cannot hold normal traffic speed. Spotting one early gives you room to react.
11. Coming down a long mountain grade you pass a sign reading 'Maximum Safe Speed'. As a commercial driver you should treat that number as:
Correct answer: A limit you must never go faster than
Where a grade posts a maximum safe speed, that figure is a ceiling you must never go above. Depending on your load, the length of the hill and the weather, a still slower speed may be the right choice.
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