Free Iowa DMV practice test for your learner's permit — road signs, right-of-way and the rules of the road, with real Iowa knowledge-exam questions.
The Iowa 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 Iowa's official driver handbook and state sources. Last verified 20 August 2026.
Answer: Octagon
STOP signs use the eight-sided octagon shape nationwide.
Road Signs
Answer: 20 mph
Iowa's default unposted speed limit in a business district is 20 mph.
Speed & Spacing
Answer: Primary — an officer can stop and cite you for it alone
Iowa's seat belt law is a primary offense — an officer can pull you over for it alone.
IA Laws
Answer: 14
Iowa's minimum age for an instruction permit is 14.
Teen & Permit Rules
Answer: Fully change lanes, as when passing any other vehicle
Iowa treats passing a bicyclist like passing any other vehicle — you must fully change lanes.
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: 25 mph
Absent a posted sign, Iowa's default limit in residential and school districts is 25 mph.
Speed & Spacing
Answer: Front-seat occupants of any age
Iowa requires front-seat occupants of any age to wear a seat belt.
IA Laws
Questions and exam format researched against Iowa's official driver handbook and state sources. Last verified 20 August 2026.
Iowa DOT Driver's Manual (M1170, 07/23/2026 edition), PDF fetched directly from https://iowadot.gov/media/7308/download?inline (linked from https://iowadot.gov/drivers-licenses-ids/driver-education/manuals-practice-tests/drivers-manual on iowadot.gov), and Iowa Code Chapter 321 via the official Iowa Legislature site, individual sections fetched directly from https://www.legis.iowa.gov/docs/code/{section}.pdf — specifically §321.277 (reckless driving), §321.555 (habitual offenders), §321.384 (headlight/lamp timing), §321.20B (financial liability/insurance proof requirement), and §321.261/§321.263 (duty to stop and render aid after an injury accident) — researched and verified 2026-08-19, re-verified and expanded 2026-08-20. Exam format: re-fetched iowadot.gov/mvd/driverslicense, its manuals-practice-tests hub, its take-practice-test page, and its drivers-manual page directly this session (all four independently) — each confirms only that the ONLINE PRACTICE test generates 25 questions from a larger sample pool 'that includes questions from the real knowledge test,' with an 80% passing score; none of them, nor the linked manual PDF (image-based/scanned, 8.6MB, could not be text-extracted this session), states how many questions are on the actual in-person knowledge test at a license station. The practice test's 25-question count is explicitly not presented as equal to the real exam's length, so it was deliberately NOT substituted in as ruleCount. This module continues to use a 35-question estimate (ruleCount: 35) paired with the CONFIRMED-and-reconfirmed 80% pass threshold as a unified knowledge test with no separate sign-recognition section (signCount: 0) — the question count remains an honest estimate to re-verify if Iowa DOT ever publishes one, while the pass percentage is solid. Iowa does not use a numeric point/demerit system for driver violations (confirmed against Iowa Code §321.555); the 'points' category in this module is deliberately modeled around Iowa's real conviction-count 'habitual offender' framework (3+ major offenses in 6 years, or 6+ reportable offenses in 2 years, excluding equipment/parking/registration violations and speeding under 15 mph over the limit) rather than inventing a fake point table. META-QUESTIONS FIXED 2026-08-20: r40 previously asked what 'rule of thumb' the manual gives for headlights (a document-coverage meta-question, not a real driving fact) — replaced with a real, sourced fact from Iowa Code §321.20B (financial liability coverage card requirement and the 48-hour grace period to remove an uninsured vehicle from the highway after citation), fetched and read directly from legis.iowa.gov. Note: this session independently checked whether the wipers-on-means-lights-on framing was at least a genuine codified rule elsewhere — it is not: §321.384's actual legal trigger is the 500-foot visibility threshold already covered by r39, with no mention of wipers, confirming the original framing was manual color-commentary rather than a codified requirement. r41 previously asked how Iowa's (lack of a) point system 'compares to many other states' — a genuine other-states-comparison meta-question, and also redundant with r45, which already states the same underlying fact (no numeric point system) directly — replaced with a real, sourced fact from Iowa Code §321.261/§321.263 on the criminal consequences (serious misdemeanor up to a felony, plus mandatory license revocation) of failing to stop and render aid after an injury accident. Full scan of the remaining 112 rule entries for this session found no other genuine document- or other-state-comparison meta-questions; a few entries phrase their stem as 'what does Iowa's manual say' (e.g. r10, r15) but each states a real, substantive driving fact rather than testing the document's own structure, so those were left as-is. Known gaps deliberately NOT invented: the exact work-zone speeding fine multiplier (the manual says fines 'may double' with no further figure given); a real headquarters-city nuance (Iowa DOT's actual headquarters is in Ames, but 'Des Moines DOT' is used as the flavor boss-checkpoint name per the state capital); and any dollar fine amounts beyond those explicitly confirmed (seat belt $50/$100, open container up to $200, test refusal minimum $1,250). Re-verify periodically, as Iowa DOT handbook content, fees, and thresholds change over time.
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