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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.
reflectors, on the lines on the edge of the road, always mean you are facing traffic the wrong way and could have a head-on collision.
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
The reference point is FROM that direction AND that is the way it is blowing.
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.
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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.
All lanes on that street go one direction only
In the U.S.A it means you have the right of way but proceed with caution.
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.