Free Illinois DMV practice test for your learner's permit — road signs, right-of-way and the rules of the road, with real Illinois knowledge-exam questions.
The Illinois knowledge test is a single 35-question exam covering road signs and the rules of the road together. You need 28 correct (80%) to pass.
Questions and exam format researched against Illinois's official driver handbook and state sources. Last verified 18 August 2026.
Answer: Octagon
STOP signs are always the eight-sided octagon shape, so they are recognizable even from behind.
Road Signs
Answer: 70 mph
Illinois interstates and tollways carry a maximum speed limit of 70 mph.
Speed & Spacing
Answer: From sunset to sunrise, whenever wipers are running, or whenever visibility is under 1,000 feet
Illinois requires headlights from sunset to sunrise, any time wipers are in use for weather, or whenever visibility drops below 1,000 feet.
IL Laws
Answer: 15
Illinois teens on the standard driver's-education track can apply for a permit at age 15.
Teen & Permit Rules
Answer: 3 feet, measured from the vehicle's side mirror to the bicyclist
Illinois's safe passing law requires at least 3 feet of clearance, measured from the vehicle's side mirror edge to the bicyclist.
Sharing the Road
Answer: An advance warning for a railroad crossing
The circular sign shape is specifically reserved as an advance warning for an upcoming railroad crossing.
Road Signs
Answer: 65 mph
Illinois 4-lane highways are capped at 65 mph, a step below the interstate/tollway maximum.
Speed & Spacing
Answer: 500 feet
Illinois requires dimming high beams within 500 feet of an oncoming vehicle.
IL Laws
Questions and exam format researched against Illinois's official driver handbook and state sources. Last verified 18 August 2026.
Illinois Secretary of State official "Rules of the Road" handbook (ilsos.gov, 2026 edition) and its official practice workbook; Illinois Administrative Code 92 §1040.20 (violation point values) and §1040.30 (suspension/revocation thresholds), via ilga.gov — researched and verified 2026-08-18. Exam format: ilsos.gov officially confirms a unified 35-question test (15 sign-identification + 20 rules-of-the-road, one combined pool with no separate sign-section gate). The passing score is NOT officially published on ilsos.gov; only third-party sources cite 80%, which this module uses (rulePassPct: 0.8) with this caveat noted explicitly rather than presenting it as confirmed. signCount/signPassCount are set to 0 per the app's unified-format convention, since the 15 sign questions are folded into the same 35-question pool as the 20 rules questions rather than gated separately. Known gaps deliberately NOT invented, per the research doc: exact dollar fines for work-zone speeding, seat belt, handheld-phone, and child-restraint violations (none published in the handbook); truck/bus no-zone footage figures (diagram shown but no numbers given); reckless driving has no mph threshold (conduct-based only, correctly reflected as such rather than inventing a number); Illinois does not use a curb-color system, so no colored-curb rules were written; no distracted-driving statistic is published. Re-verify periodically, as SOS handbook content, fees, and point/suspension thresholds change over time.
Unofficial study aid. Not affiliated with or endorsed by any DMV or state agency.