Illinois Class D Written Exam Practice
Full test preview Question 1 of 35
0 answered 35 remaining
Passing target: 80% (28/35)
On a good road in good weather, how can a driver check a basic safe following interval?
Blue car A follows silver car B on a two-way road. A fixed roadside post is beside the road, level with the rear of B.
Correct answer: Pick a fixed object and reach it no sooner than three seconds after the vehicle ahead.
Why
On a good road in good weather, use the handbook’s three-second following guide. Choose a fixed roadside object; after the vehicle ahead passes it, your vehicle should not reach it before three seconds have passed. Increase the gap for poor visibility, slippery roads, and other hazards. Illinois law requires a reasonable and prudent distance for the actual speed, traffic, and road conditions.
Verified against Illinois Rules of the Road, July2026 · Three-second following check · p. 86
Report a question issueContinue learning