Controlling speed and stopping distance
Section 2.6 of the Mississippi CDL Manual (p. 2-14) covers controlling speed, including stopping distance. It is tested on the General Knowledge test.
Key facts
| Part of | the General Knowledge test (80% to pass) | 49 CFR 383.135 |
|---|---|---|
| Manual section | §2.6 Controlling speed | MS CDL Manual p. 2-14 |
| Questions in CDL Mile's bank | 11 | CDL Mile, checked against MS CDL Manual |
Key rules
- § 2.6.7p. 2-16
Speeding traffic is the leading cause of injuries and deaths in work zones. Always obey the posted work zone limit, and slow down even more when a worker is near the roadway.
Roadway Work Zones
- § 2.6.5p. 2-15
When everyone moves in the same direction at the same speed, collisions are unlikely. Match the flow when you can do it legally and safely, and still keep a safe following distance.
Speed and Traffic Flow
- § 2.6.2p. 2-15
When the tires ride up on water they lose traction. Let off the accelerator and push in the clutch so the truck slows and the wheels turn freely, and do not brake.
Matching Speed to the Road Surface
Try two questions
General Knowledge · Controlling speed
On a downgrade, what does the manual say should be your main way of controlling your speed?
Tap an answer to see the explanation and the manual page.
General Knowledge · Controlling speed
In fog, heavy rain, or at night on low beams, what does the manual say your speed should always allow you to do?
Tap an answer to see the explanation and the manual page.
More General Knowledge topics
Sources
Mississippi Commercial Driver's License Manual, version March 2025, Mississippi Department of Public Safety. Page references are to its printed page numbers. CDL Mile is independent and not affiliated with Mississippi DPS.
Updated for the March 2025 Mississippi CDL manual. Last checked November 5, 2026.
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