Free Idaho DMV practice test for your learner's permit — road signs, right-of-way and the rules of the road, with real Idaho knowledge-exam questions.
The Idaho knowledge test is a single 40-question exam covering road signs and the rules of the road together. You need 34 correct (85%) to pass.
Questions and exam format researched against Idaho's official driver handbook and state sources. Last verified 20 August 2026.
Answer: Octagon
STOP signs use the eight-sided octagon shape nationwide, so they're recognizable even from behind.
Road Signs
Answer: 75 mph
Idaho's default interstate speed limit is 75 mph unless a higher limit is posted.
Speed & the Basic Rule
Answer: All occupants of the vehicle
Idaho's seatbelt law requires all occupants riding in a vehicle equipped with safety belts to wear them.
Idaho Laws
Answer: 30 hours
Idaho's DT program requires 30 hours of classroom instruction for drivers under 17.
Teen & Permit Rules
Answer: With the flow of traffic
Bicyclists must ride with the flow of traffic, as far right as safely practicable.
Sharing the Road
Answer: School zones, pedestrians, or bicyclists
Fluorescent yellow-green is reserved specifically for school, pedestrian, and bicyclist warning signs.
Road Signs
Answer: 80 mph
Idaho interstates may be posted up to 80 mph in authorized stretches.
Speed & the Basic Rule
Answer: 0.08%
0.08% BAC is the legal limit for adult drivers in Idaho.
Idaho Laws
Questions and exam format researched against Idaho's official driver handbook and state sources. Last verified 20 August 2026.
Idaho Driver's Handbook (July 2026 edition), official PDF fetched directly from https://itd.idaho.gov/wp-content/uploads/2026/04/driver_manual.pdf — linked from the Idaho Transportation Department's own "Taking the Driver's Test" guide at https://itd.idaho.gov/guide/taking-the-drivers-test/, reached via the ITD DMV portal at https://itd.idaho.gov/dmv (dmv.idaho.gov 302-redirects there) — plus the ITD Graduated Driver Licensing (GDL) Fact Sheet, form ITD 3506 (Rev. 4/24), fetched directly from https://itd.idaho.gov/wp-content/uploads/2025/04/3506_gdlfactsheet.pdf. Researched and verified 2026-08-19; citation gap closed and both documents re-fetched and text-extracted 2026-08-20. CITATION CORRECTION 2026-08-20: the prior note labeled the handbook "ITD 01-9530906" — that form number appears NOWHERE in the extracted text of the live PDF (whose cover reads simply "DRIVER'S HANDBOOK / JULY 2026"), so it has been dropped rather than carried forward unverified; the July 2026 edition date and the ITD 3506 (Rev. 4/24) fact-sheet number ARE both confirmed verbatim in the fetched files. Mock exam format is fully confirmed by the current handbook, not estimated — its "Knowledge Test: Class D (Non-Commercial)" section states verbatim: "The knowledge test consists of 40 questions; you can miss up to six (6) questions before failing the test," i.e. 34/40 = 85%, drawn from one combined pool with no separate sign-recognition section (signCount: 0). Known gaps deliberately NOT invented, per the handbook's own silence on them: the exact dollar multiplier/fine amount for work-zone speeding penalties; a specific mph-over-limit threshold for reckless driving (Idaho's statute is conduct-based — 'willful disregard for safety' — with no fixed number given); a violation-by-violation points table (only the 1-4 point range and the suspension thresholds are published); the dollar fine amount for parking in a handicap space without a valid placard; an Idaho-specific weight/height bracket for child safety seats beyond the confirmed 'age 6 and under' rule; and any GDL-specific cell-phone restriction beyond the general statewide texting law (none was found for permit/provisional drivers specifically). Re-verify periodically, as ITD handbook content, fees, and thresholds change over time.
Unofficial study aid. Not affiliated with or endorsed by any DMV or state agency.