Traffic signals and markings1 of 2
What does a flashing yellow light mean?
The answer
Answer: B. A flashing yellow is a caution signal. You may enter the intersection, but you should slow down and watch for other traffic and pedestrians. Slow down, look for traffic and pedestrians, and be ready to stop before you continue through.
Source: Illinois Rules of the Road 2026 — Chapter 10: Traffic Signals, p. 77