What Does the Cross-Shaped Traffic Light Mean – And What Should You Do If You See One?

What the so-called "Greek Cross" indicates and how to respond when you encounter it

When learning to drive, one of the first things new drivers are taught is the meaning of traffic light colors—red, yellow, and green. But beyond this familiar color code, some European cities are adopting additional signals to better manage traffic flow and improve safety at complex intersections.

In certain areas, including parts of France, traffic authorities have introduced an unusual but practical addition to traditional lights: a red cross-shaped signal, often referred to as the “Greek Cross.”

What is the “Greek Cross” Traffic Light?

The red cross is exactly what it sounds like—a red light in the shape of a cross. In some Parisian intersections, this symbol has proven especially useful in helping drivers safely make left turns. When the red cross is illuminated, it tells the driver that oncoming traffic has been stopped by a red light, making it safe to turn left across the intersection.

On the other hand, if the red cross is not lit, this means that oncoming traffic has a green light—and the driver must yield and proceed with caution before turning.

Why Is It Called the “Greek Cross”?

Though the origin of the name isn’t definitively known, the term “Greek Cross” refers to the shape of the signal—resembling a symmetrical cross with arms of equal length, similar to the classic Christian cross commonly associated with Greek Orthodoxy. It’s not necessarily tied to Greece itself, but rather to the geometric shape.

What Should You Do If You Encounter One?

If you find yourself driving in a city where these signals are used—such as Paris—here’s what to remember:

• Red cross illuminated: You can safely turn left; oncoming traffic is stopped.

• Red cross off: Oncoming traffic has the right of way; wait and proceed only when safe.

As cities look for smarter ways to manage growing traffic volumes, signals like the Greek Cross offer a simple yet effective solution—one more tool to help drivers navigate urban roads with greater safety and clarity.