Virginia CDL — General Knowledge practice
Virginia 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
20 questions · pass with 16 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 cold weather, which part of the road tends to freeze first?
Correct answer: Bridges and overpasses
Bridges lose heat from above and below, so they freeze before the surrounding roadway; watch out near 32 degrees Fahrenheit.
Source: Virginia CDL Manual — Section 2: Driving Safely (Identifying Slippery Surfaces)
2. On packed snow, how much should you reduce your speed?
Correct answer: By about one-half or more
Packed snow calls for cutting speed by half or more; on ice you should slow to a crawl and stop as soon as it is safe.
Source: Virginia CDL Manual — Section 2: Driving Safely (Slippery Surfaces)
3. Driving a 40-foot vehicle faster than 40 mph, how many seconds should you leave between you and the vehicle ahead?
Correct answer: 5 seconds
A 40-foot vehicle needs 4 seconds below 40 mph; above 40 mph you add one second, for 5 seconds.
Source: Virginia CDL Manual — Section 2: Driving Safely (Space Ahead)
4. What is a good way to handle a tailgater?
Correct answer: Open up more space in front of you
Increasing your following distance gives you room to slow gradually and gives the tailgater a better opening to pass.
Source: Virginia CDL Manual — Section 2: Driving Safely (Dealing with Tailgaters Safely)
5. On a left turn, when should you begin turning the wheel?
Correct answer: After reaching the center of the intersection
Wait until you have reached the intersection's center; turning too early can bring your left side into another vehicle because of off-tracking.
Source: Virginia CDL Manual — Section 2: Driving Safely (Left Turns)
6. If your vehicle starts to hydroplane, what should you do?
Correct answer: Ease off the accelerator and push in the clutch
Release the accelerator and depress the clutch so the wheels turn freely and slow down; braking during a hydroplane can make it worse.
Source: Virginia CDL Manual — Section 2: Driving Safely (Hydroplaning)
7. When a heavy load holds you back and a driver tailgates you on an upgrade, what helps most?
Correct answer: Staying in the right lane if you can
Keeping to the right lets faster traffic pass and reduces tailgating when your load holds you back on a grade.
Source: Virginia CDL Manual — Section 2: Driving Safely (Space Behind — Stay to the Right)
8. Total stopping distance is made up of which three parts?
Correct answer: Perception distance, reaction distance, and braking distance
Perception distance plus reaction distance plus braking distance together make up the total stopping distance.
Source: Virginia CDL Manual — Section 2: Driving Safely (Stopping Distance)
9. To make a right turn in a large vehicle that cannot stay in one lane, you should:
Correct answer: Turn wide as you finish, keeping the rear near the curb
Keep the rear close to the curb and swing wide only as you complete the turn, so other drivers cannot squeeze past on your right.
Source: Virginia CDL Manual — Section 2: Driving Safely (Space for Turns — Right Turns)
10. Why do you need a larger gap to cross or enter traffic in a commercial vehicle than in a car?
Correct answer: Large vehicles accelerate slowly and take up more room
Because of slow acceleration and the space a big rig occupies, you need a much bigger opening, and you must be sure you can clear the road before traffic reaches you.
Source: Virginia CDL Manual — Section 2: Driving Safely (Space Needed to Cross or Enter Traffic)
11. Hydroplaning can begin at speeds as low as what, when a lot of water is on the road?
Correct answer: 30 mph
With enough standing water, tires can lose contact and hydroplane at speeds as low as 30 mph, especially with low pressure or worn tread.
Source: Virginia CDL Manual — Section 2: Driving Safely (Hydroplaning)
12. Going from 20 mph up to 40 mph roughly multiplies your braking distance by how much?
Correct answer: About four times as long
Doubling speed multiplies braking distance and impact force by about four; tripling the speed multiplies them by about nine.
Source: Virginia CDL Manual — Section 2: Driving Safely (Effect of Speed on Stopping Distance)
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