Back to Idaho
Idaho Class D Knowledge Practice Test
Full test preview Question 1 of 40
0 answered 40 remaining
Passing target: 85% (34/40)
Observation, Speed & SpaceStandalone practice
In good conditions, what minimum following interval is recommended behind another car?
Blue car A follows silver car B in good conditions. A fixed roadside post is level with B’s rear in this starting frame.
Correct answer: At least three seconds
Why
The handbook recommends at least three seconds behind another car in good conditions. Increase this interval at higher speeds and in poor weather. The law requires a reasonable and prudent gap for the speed, traffic and road conditions; three seconds is not a guarantee that every stop is safe.
Verified against Idaho Driver’s Handbook, July 2026 · Minimum time cushion · p. 79
Report a question issueContinue learning
Related Idaho questions
When can driving below the posted maximum still violate Idaho law?What is the value of keeping open space beside your vehicle when possible?Why should you scan farther down the road instead of watching only the vehicle directly ahead?When stopping behind another vehicle, what visible reference helps preserve an escape cushion?The posted limit is 55 mph, but packed snow makes that speed unsafe. What should you do?A vehicle is following you too closely. What is a safe response?