Hi there
user
Hello! How can I help you today?
assistant
I'm having trouble with traffic signals in my area. Can you tell me why some traffic lights have three colors and others have four?
user
Three-color traffic lights typically have red for stop, yellow for caution, and green for go. Four-color traffic lights often include a red arrow for turning or a flashing yellow arrow for yielding.
assistant
That makes sense. What about the timing of the traffic lights? Is there a standard duration for each color?
user
There isn't a universal standard, but most traffic lights follow a general pattern. The green light usually lasts around 30-90 seconds, while the yellow light typically lasts 3-5 seconds, and the red light can vary depending on the intersection.
assistant
I see. So, the timing of traffic lights can vary depending on the location?
user
Exactly. The timing of traffic lights is often adjusted based on factors like traffic volume, pedestrian traffic, and road conditions to ensure safe and efficient traffic flow.
assistant