Managing space and following distance

Section 2.7 of the Kentucky CDL Manual (p. 2-16) covers managing the space around your vehicle, including following distance. It is tested on the General Knowledge test.

Key facts

Part of	the General Knowledge test (80% to pass)	KY CDL Manual, front section pp. 2-3
Manual section	§2.7 Managing space	KY CDL Manual p. 2-16
Questions in CDL Mile's bank	9	CDL Mile, checked against KY CDL Manual

Key rules

§ 2.7.7p. 2-19
Big trucks speed up slowly and take up a lot of room, and a heavy load slows acceleration even more. Wait for a gap big enough to get all the way across before traffic arrives.
Space Needed to Cross or Enter Traffic
§ 2.7.2p. 2-17
When someone tailgates you, increase your following distance. The extra room ahead means you are less likely to need sudden speed or direction changes, and it gives the tailgater an easier chance to pass.
Space Behind
§ 2.7.1p. 2-16
Allow 1 second for every 10 feet of vehicle length, then add 1 second above 40 mph. For a 50-foot rig at 55 mph: 50 / 10 = 5 seconds, plus 1 = 6 seconds.
Space Ahead

Try two questions

General Knowledge · Managing space

You are making a left turn at an intersection that has two left-turn lanes. Which lane does the manual say to use?

Tap an answer to see the explanation and the manual page.

General Knowledge · Managing space

Accident reports show that trucks and buses most often crash into the vehicle in front of them. What is the most frequent cause?

Tap an answer to see the explanation and the manual page.

Sources

Kentucky Commercial Driver's License Manual, version March 2025, Kentucky State Police. Page references are to its printed page numbers. CDL Mile is independent and not affiliated with Kentucky State Police.

Updated for the March 2025 Kentucky CDL manual. Last checked November 5, 2026.

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