Arkansas CDL — General Knowledge practice
Arkansas CDL — General Knowledge: Speed & Space Management practice test
Choosing a safe speed, keeping a space cushion, adjusting for weather and traffic, and understanding stopping distance.
Content reviewed against official driver handbooks · August 12, 2026
15 questions · pass with 12 correct. You get instant feedback and an explanation after every answer.
Study questions with answers
12 sample Speed & Space Management questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
Show all 12 questions with answers
1. In a work zone, when should you reduce speed even further?
Correct answer: When workers are near the road
Obey posted limits through work zones, keep your speed from creeping up, slow for bad weather or road conditions, and slow down more when a worker is near the road.
Source: Commercial Driver's License Manual — Section 2.6, Controlling Speed
2. At night you must use low beams. About how far ahead can you see with them, and what should you do?
Correct answer: About 250 feet, so slow down enough to stop within that distance
Low beams light about 250 feet ahead, and high beams about 350 to 500 feet. Drive slowly enough that you could stop inside the distance your headlights reach.
Source: Commercial Driver's License Manual — Section 2.11, Driving at Night
3. Why can a heavily loaded vehicle get hung up on a dirt road or in an unpaved yard?
Correct answer: The space beneath the vehicle can be very small under a heavy load
The space under a vehicle is easy to overlook, and it shrinks under a heavy load. Cross dips such as drainage channels carefully, since the ends of some vehicles can drag.
Source: Commercial Driver's License Manual — Section 2.7, Managing Space
4. Total stopping distance is made up of perception, reaction, and braking distance. At 55 mph, which of these is about 61 feet?
Correct answer: Reaction distance
Average reaction time is three-quarters of a second to one second, which covers about 61 feet at 55 mph. Perception distance (about 142 feet) and braking distance (about 216 feet) are separate parts of the total.
Source: Commercial Driver's License Manual — Section 2.6, Controlling Speed
5. On dry pavement with good brakes, about how far does a vehicle travel while braking from 55 mph?
Correct answer: About 216 feet
Braking from 55 mph takes about 216 feet on a dry road with sound brakes. Adding perception and reaction distance brings the total to at least 419 feet.
Source: Commercial Driver's License Manual — Section 2.6, Controlling Speed
6. The temperature is near 32°F. Which part of the road is likely to freeze first?
Correct answer: Bridges
When temperatures fall, bridges freeze before the road does, so be especially careful around 32 degrees Fahrenheit. Shaded spots also stay icy long after open areas thaw.
Source: Commercial Driver's License Manual — Section 2.6, Controlling Speed
7. You were traveling at 50 mph when the road turns to packed snow. Which new speed fits the manual's guidance?
Correct answer: 25 mph or slower
On packed snow, cut your speed by half or more, so 50 mph becomes 25 mph or less. A one-third reduction is the guide for wet roads, and ice calls for a crawl.
Source: Commercial Driver's License Manual — Section 2.6, Controlling Speed
8. In many states truck and bus speed limits are lower than car limits. Why does that call for extra caution?
Correct answer: The difference can be as much as 15 mph, so take extra care changing lanes or passing
Truck and bus limits may run as much as 15 mph below car limits, so take extra care when changing lanes or passing on those roads.
Source: Commercial Driver's License Manual — Section 2.6, Controlling Speed
9. Why is braking while in a curve dangerous?
Correct answer: It makes it easier to lock the wheels and skid
Slow to a safe speed before entering a curve. Braking in the curve makes wheel lockup and skids more likely; be in a gear that lets you accelerate slightly through it.
Source: Commercial Driver's License Manual — Section 2.6, Controlling Speed
10. At 60 mph, how does your stopping distance compare with the length of a football field?
Correct answer: It is longer than a football field
The manual points out that stopping distance at 60 mph exceeds the length of a football field. Higher speeds sharply increase both stopping distance and the severity of a crash.
Source: Commercial Driver's License Manual — Section 2.6, Controlling Speed
11. How can you quickly check whether the road may be starting to ice up?
Correct answer: Reach out the window and feel the mirror, its support, or the antenna for ice
If ice is forming on your mirror, its support, or the antenna, the road surface is probably icing too. A lack of spray from other vehicles is another sign of ice.
Source: Commercial Driver's License Manual — Section 2.6, Controlling Speed
12. What does it mean when brakes start to 'fade'?
Correct answer: Ever more pedal pressure is needed for the same braking
Brakes that get too hot lose effectiveness, so it takes more and more pressure to get the same braking. Keep braking hard and they can fade until you can't slow down or stop.
Source: Commercial Driver's License Manual — Section 2.16, Mountain Driving
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