This may be due to a "local practice" or may also be due to the use of older/out moded signal equipment.
Red, red and amber, green, amber, red. It depends where you are. In North America, they go red, green, yellow, red. In at least some places in Europe they go red, amber, green, amber, red.
The green light on the traffic light is on the bottom. The yellow is in middle, the red is on top. However, in some municipalities, the traffic lights are not vertical, they are horizontal. In these instances, the green light is usually, but not always, the furthest to the right.
The lowest light on a traffic signal is green. Some cities use traffic lights that are not arranges top to bottom but rather side to side. In this event the green light is usually the furthest to the right.
This is called a "stale green" signal. It is about to change to amber. This is also recognized at some intersections by the flashing crosswalk signal informing pedestrians not to cross.
Some lights have sensors :)
Some lights have sensors :)
They have moition sensors that detect movement
Some intersections have traffic lights instead of round abouts because there is too much traffic on some intersections for a roundabout to be safe. Roundabouts have to have a certain amount of traffic to be safe enough for no traffic light.
traffic lights can hurt animals such as deer.Deer freeze or run in front of cars when hey see lights. Imagine now a deer and LOTS of lights
The traffic lights impacted the world because it gave some rules in driving and so there were not that much accidents to happen.
Flashing traffic lights are used when the control system is not functioning properly, or when there is very low level traffic (to the point that lights become unnecessary).
Amber, but some people think it is green