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Traffic Signals and Pavement Markings — Illinois Driver's License Practice Test

Traffic Signals and Pavement MarkingsQuestion 1 of 30

40 questions in this topic · 30 drawn at random this round

At a steady green light, what must you do before going?

Illinois Rules of the Road

All questions are based on the official Illinois Rules of the Road handbook. Study the relevant chapter to reinforce your knowledge.

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This Illinois Driver's License Traffic Signals and Pavement Markings practice set has 40 practice questions based on the official exam materials, each with an instant explanation. You need 80% on the real Illinois Driver's License knowledge test to pass.

Topic overview

This chapter explains what Illinois' traffic signals, lane signals, and pavement markings mean and when you may legally proceed. It covers steady red/yellow/green lights, flashing red and yellow lights, turn arrows, pedestrian "Walk"/"Don't Walk" signals, and overhead lane-control signals used on expressways.

Pavement-marking questions are heavily tested: solid vs. broken white lane lines, single vs. double yellow center lines, no-passing zones, two-way left-turn lanes, and railroad-crossing markings. Know which lines you may cross to pass or turn and which you may never cross.

A frequent mistake is treating a flashing yellow light as a full stop — it only calls for caution, not a stop. Another is forgetting that at a signal that has stopped working entirely, every direction must treat the intersection as an all-way stop.

What's the difference between a flashing red light and a flashing yellow light?

A flashing red light means you must stop completely, yield to traffic in the intersection, and then go when it is safe — treat it like a stop sign. A flashing yellow light only warns you to proceed with caution; it does not require a full stop.

When am I allowed to cross a double yellow center line?

Double solid yellow lines mark opposite-direction traffic and normally may not be crossed, but you may cross them to make a left turn into or out of an alley, private road, driveway, or street.

What should I do at an intersection where the traffic signal is not working?

Treat the intersection as an all-way stop: come to a complete stop, then look and yield the right-of-way before entering, unless a law-enforcement officer is directing traffic differently.

Written from the official Illinois Rules of the Road — Traffic Signals and Pavement Markings ↗· Last checked: 2026-07-10· Reviewed by the PassPrep editorial team· How we verify →

Sample questions

Three questions from the Traffic Signals and Pavement Markings bank with the correct answer and an explanation. The practice quiz above draws 30 questions at random from the same bank.

When must a driver obey traffic signals and pavement markings?
- Always, unless a police or traffic control officer directs otherwise — Correct answer
- Only during daylight hours
- Only when other vehicles are present
- Only on state highways
Explanation: Traffic signals and pavement markings must always be obeyed unless a police officer or other traffic control officer directs you to do otherwise.
Handbook: Traffic Signals and Pavement Markings — Obeying Signals
Is a driver ever allowed to drive off the roadway to avoid a traffic signal?
- No, a driver may never leave the roadway to avoid a traffic signal — Correct answer
- Yes, if the light has been red for a long time
- Yes, if there is no traffic around
- Yes, when turning right
Explanation: A driver may never leave the roadway to avoid a traffic signal.
Handbook: Traffic Signals and Pavement Markings — Obeying Signals
How many colors do traffic lights at intersections usually have, and how are they arranged?
- Three colors -- red, yellow, and green -- from top to bottom or left to right — Correct answer
- Two colors -- red and green -- only
- Four colors arranged in a square
- Five colors arranged in a circle
Explanation: Traffic lights usually have three colors -- red, yellow, and green -- arranged from top to bottom or from left to right.
Handbook: Traffic Signals and Pavement Markings — Traffic Signals