Illinois written exam
Illinois written-test format and passing score
The Illinois Class D written exam consists of 35 questions and requires 80% correct. The state review workbook says 15 questions cover traffic-sign identification and the remaining 20 are multiple-choice or true/false.
- 35questions
- 28correct answers for 80%
- 15traffic-sign questions
You need 80% to pass
Illinois administrative rules set the Class D passing standard at 80%. On a 35-question exam, that corresponds to 28 correct answers.
Fifteen questions are sign identification
The state workbook breaks the exam into 15 traffic-sign identification questions plus 20 questions that are multiple-choice or true/false. Treat signs as a major part of the test, not a small side topic.
What the remaining questions cover
The Rules of the Road says the written exam tests traffic laws, safety rules, crash prevention and vehicle equipment, along with signals and pavement markings.
Related Road to Permit guides
Official sources
- Illinois Secretary of State — Rules of the Road Review Workbook
- Illinois Secretary of State — 2026 Rules of the Road
- Illinois Secretary of State — Administrative Rules, written test
Independent study resource. Road to Permit is not affiliated with or endorsed by any DMV, DPS, FLHSMV or other government agency. Official state sources control if information changes.