A reference point since it doesn't move they only way it changes is with its relitive location from something else.
Usually a big white line, if there is no line- out of the way of opposing traffic.
A reference point is needed to describe a location because it provides a consistent and universal way to communicate the position of an object or place in relation to other objects or places. By using a reference point, we establish a common frame of reference that enables accurate communication and understanding of spatial relationships.
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There are many ways you can design a simple traffic light circuit. I recommend you to use a 4017 IC. Please check this site as reference. It's a two way traffic light circuit. http://circuitdesolator.blogspot.com/2011/01/traffic-light-circuit-based-on-4017.html
If the traffic light is not powered, you are to treat it as a all-way stop sign. I'm assuming that's what you mean by that. If the traffic light is broken, likely there will be utility workers out there working to fix it and you follow their instructions if any.
The red flashing traffic light means that you are to come to a stop, yield to other traffic and then you can procede when the way is clear.
A reference point is typically considered as a fixed location or object that other positions or movements are measured relative to. It serves as a basis for comparison or orientation in a system of coordinates or in describing the motion of objects. The reference point provides a frame of reference for analyzing and interpreting data.
In the U.S.A it means you have the right of way but proceed with caution.
All lanes on that street go one direction only
It means a person (or thing) is acting (or placed) in such a way to slow or even stop the normal flow of traffic, especially when it causes a situation to become dangerous.
In the USA: Two way traffic divider, passing (both sides) allowed.