How long do the red, yello, and green lights last for traffic lights?

Question

As in how long do you have to wait in a car for a red light befor it turns to green again etc.

Answer 1

there's no 2 alike, they're all different :(

Answer 2

it all depends on what kind of system the city utilizes for traffic flow. Some of the kinds are loop detetectors, infrared, and pressure plates just under the asphalt. The place i work uses an overhead camera system to control traffic. During peak hours our traffic flow for a lane going through the intersection will last about 45 seconds, with the standard 3-4 second yellow delay followed by a 45 second red. But where i work the traffic flow is that of a city with a population of 20,000. Generally speaking your wait should be 45 seconds for a green, 3-4 seconds for the yellow (this allows the intersection to clear), followed by a 45 second red.

Answer 3

They vary from signal to signal and also based on the day of the week and the time of the day. You will wait longer at a red light during rush hour traffic than you would wait at the same light during lighter traffic times. The times are computed by traffic engineers based on collected data from the intersection/street they control. The object being to get the best traffic flow possible.

Answer 4

Setting traffic signal timings are usually done by licensed engineers. Traffic counts (those rubber tubes you see on the ground or people sitting in a lounge chair with a large board that looks like an intersection pushing buttons on people going left, straight or right)

The yellow light duration is related to the speed limit, pavement and visibility conditions.

Red and greens are determine by traffic volumes of turning movements, through traffic and cross traffic.

Answer 5

It depends on the light. Some lights last longer than others. The time is based off a study about how many cars pass through the area.

Answer 6

It varies by location, traffic congestion, time of day, and even the direction from which a vehicle approaches the light. The goal? Hopefully to get us where we are going in the most expeditious manner... however, I often think traffic lights are used by some communities to slow down traffic. (A speed bump in the daily life of a commuter by any other name is a "red" traffic light.)

Answer 7

actually, i think that people are hired to control the lights,. You should notice that sometimes you have to wait for the red light to turn green for only five secs. Sometimes you have to wait way longer. depends on how much traffic there is

Answer 8

It depends on the city, the street and the time of day. Each city will set them according to traffic trends. Usually late at night they change rather quick but during heavy traffic they usually (but not always) stay on each colour longer

Answer 9

They are all different. Some are on timers, other have pressure sensors that detect whether or not cars are waiting on a certain light to change.

Answer 10

they can last for 5-7 years before replacement

Answer 11

it all depends where you are. In cities, you will notice they change faster - in a quiet suburb, they take longer to change