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Idaho Class D Knowledge Practice Test
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Freeways & High-Speed RoadsStandalone practice
What is the main purpose of a freeway acceleration lane?
Blue car A is in a freeway acceleration lane below two eastbound through lanes. Silver B is ahead and silver C behind in the nearest through lane, with an illustrative space between them.
Correct answer: To reach freeway speed and find a safe gap to merge
Why
Use the acceleration lane to approach the freeway's traffic speed, check for a gap, signal, and blend without forcing established traffic to brake.
Verified against Idaho Driver’s Handbook, July 2026 · Freeway acceleration lane · p. 83
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