# What makes the traffic light so important?

Traffic lights are important because they regulate traffic safely and make movement of traffic smoother and faster at intersections.

### Is a traffic light a input or a output?

A traffic signal is controlled by a control box on the side of the intersection, the control box receives data from electromagnetic sensors under the pavement, and that data is processed by amplifiers inside of the box and the traffic controller makes the appropriate decision on what to do. So to answer the question, the traffic light is a decision made by the traffic controller which is a output.

### How is the average red light duration?

Traffic lights are programmable so there is no set amount of time. This is necessary so that traffic departments can set them different depending on the amount of traffic on a particular roadway. A busy road would have shorter time periods than a road with little traffic on it so that traffic is not jammed for too long a time.

### What is the general formula that guides all prime numbers?

There is no general formula and, in some respects, that is what makes prime numbers so important and interesting to mathematicians. There is no general formula and, in some respects, that is what makes prime numbers so important and interesting to mathematicians. There is no general formula and, in some respects, that is what makes prime numbers so important and interesting to mathematicians. There is no general formula and, in some respects, that is what…

### Do you have to stop for traffic at a green light?

A green light on a traffic light set (in the UK) means automobile traffic is free to go. Walking out when commuter traffic lights are on green is a bad idea. Answer from @MunicipalSigns: In general: A steady GREEN traffic light means you can go through the intersection. You must yield to emergency vehicles and others as required by law. If you are stopped and then the light turns green, you must allow crossing traffic…