Free 2026 IL DMV Practice Tests
Based on the official Illinois Driver's Handbook. Get ready for your IL SOS written exam with our comprehensive practice tests.
IL CDL General Knowledge
arrow_forward_iosIL CDL Air Brakes
arrow_forward_iosIL CDL Combination Vehicles
arrow_forward_iosIL CDL Hazmat (H)
arrow_forward_iosIL CDL Tanker (N)
arrow_forward_iosIL CDL Doubles & Triples (T)
arrow_forward_iosIL CDL Passenger (P)
arrow_forward_iosIL CDL School Bus (S)
arrow_forward_iosPractice by Topic
Commercial Driver's License (CDL)
What to Expect on the Illinois CDL Test
Computer-based at Illinois SOS Driver Services facilities.
No time limit
$20
$20 instruction permit application fee covers vision screening and up to 3 written exam attempts within one year; a same-day retake is generally allowed at no extra cost.Appointment required at most Illinois SOS Driver Services facilities via the online DMV appointment system.
3 attempts within a one-year period per $20 application fee.
English, Spanish, Polish, Chinese, Korean
Documents to Bring to Your Illinois Test
Proof of identity, Social Security number, Illinois residency (two documents), and signature; applicants under 18 need parental consent and driver education completion.
Illinois Rules You'll See on the Test
Rules unique to Illinois that appear on the IL SOS knowledge test more than others.
- gavel Scott's Law (Move Over) requires changing lanes or slowing for any stopped vehicle with flashing lights
- gavel Zero Tolerance Law: any measurable BAC leads to license suspension for drivers under 21
- gavel Complete cell phone ban in construction and school zones
- gavel Hands-free device law statewide
- gavel GDL: 9-month permit hold, 50 hours supervised driving (10 at night) before under-18 license
Illinois DMV Test FAQ
How many questions are on the Illinois CDL permit test?
The IL SOS CDL knowledge test has 35 multiple-choice questions drawn from the official state handbook — covering road signs, traffic laws, right-of-way, and safe-driving procedures.
Do I need an appointment for the Illinois knowledge test?
Appointment required at most Illinois SOS Driver Services facilities via the online DMV appointment system.
Do I need endorsements beyond the Illinois CDL general knowledge?
Depending on what you'll haul, yes: Hazmat (H), Tank (N), Doubles/Triples (T), Passenger (P), and School Bus (S) each have their own written test. Air Brakes (L) is also required for most tractor-trailer combos.
Does the Illinois test include road-sign identification questions?
Yes. A substantial portion of the questions test recognition of standard road signs by shape, color, and meaning. Practicing at /signs alongside our full quizzes is the fastest way to lock these in.
Should I read the whole Illinois handbook before taking practice tests?
Not necessarily. Most successful test-takers skim the handbook once, then drill practice tests. When they miss a question they jump back to that chapter. This is far more efficient than a cover-to-cover read.
Can I retake the Illinois knowledge test if I fail?
Yes. 3 attempts within a one-year period per $20 application fee.
What passing score does Illinois require on the CDL test?
Federal FMCSA regulations set the passing score at 80% on the General Knowledge test and every endorsement test. IL SOS follows this federal baseline for all CDL applicants — states cannot lower it.
Can I take the Illinois DMV test in a language other than English?
Yes. IL SOS offers the knowledge test in 5 languages including English, Spanish, Polish, Chinese, and 1 more. Ask when scheduling if your language is available at your chosen office.
Who actually administers the Illinois driver knowledge test?
The IL SOS administers the test at its authorized offices. Third-party providers may proctor in some locations, but the exam content and scoring are set by IL SOS.
Is there a time limit on the Illinois knowledge test?
No — IL SOS does not enforce a strict time limit on the knowledge test. Take the time you need to read each question carefully, but don't overthink after your first instinct.