Driver's License Test Prep
Illinois Practice Traffic Lights

You approach a steady red light and plan to turn right. What is required?

  1. A.
    Wait for a green arrow before turning right.
  2. B.
    Come to a full stop and yield, unless a sign prohibits the turn. Correct
  3. C.
    Turn only when a pedestrian shows the Walk signal.
  4. D.
    Slow to a rolling stop and yield to cross traffic.
The Why

The answer is "Come to a full stop and yield, unless a sign prohibits the turn."

Right on red is legal in Illinois after a complete stop and a yield to oncoming traffic and pedestrians, unless a sign prohibits the turn or an officer directs otherwise. Drivers who bring a rolling-stop habit from quiet intersections into the exam pick D and miss the complete-stop language the manual builds into the rule.

Why the others miss

The traps in the wrong answers

A. Wait for a green arrow before turning right.

A green arrow isn't required; after a full stop and yield, right on red is allowed unless a sign prohibits it or an officer directs otherwise. This answer reads right on red as a protected movement that needs its own arrow, the way a green left arrow authorizes a protected left.

C. Turn only when a pedestrian shows the Walk signal.

The pedestrian Walk signal governs pedestrians, not the driver's right-turn permission; drivers still follow the traffic light and yield to pedestrians in the crosswalk. This answer extends the yield-to-pedestrians habit into a permission cue, treating the pedestrian Walk display as the driver's own go signal.

D. Slow to a rolling stop and yield to cross traffic.

A rolling stop doesn't satisfy the complete-stop requirement the manual builds into the right-on-red rule. This answer carries the rolling-stop habit from quiet intersections into a rule the manual writes around a full stop.

The Rule

This question tests your knowledge of Traffic Lights in Illinois. Source: Illinois Rules of the Road, "Traffic Signals, Steady Lights," p.77..

More from this topic

Related Illinois questions

More than a book

You just took one Illinois question apart. The book does it for the whole test.

The Illinois book unlocks a free companion: an adaptive study plan, progress synced across your devices, a denser laminate cheat sheet, and a test-day walkthrough. Verify your copy once, usually in seconds; there's nothing extra to buy.

Get the book on Amazon

$18.99 paperback, free companion included.

Free study plan

Your free Illinois study plan

A short run of study emails for the Illinois SOS test: what to drill, the rules people trip on, and a final pre-test checklist. The printable cheat sheet is free to grab either way.

One email a few times a month. No spam, unsubscribe anytime. Privacy.