Originally Posted by Time2Travel
^Fixed that for ya. The flashing yellow arrow should never have been used. It's a replacement for a ball indicator that is not confusing and does not imply that someone has a protected turn.
The arrow is used to indicate right of way. It indicates right of way when it's green and it indicates right of way when it's red. Some (not all) are going to think that a yellow ARROW gives them right of way which might cause an accident. Since there is no NEED for the arrow it needs to be removed. Nobody has a problem with the fact that it's a blinking yellow light. The problem is the arrow. Get rid of it, problem solved.
You BROKE it. Put it back the way it was.
It was correct before you "fixed it". Now it is wrong, and is telling drivers they have a protected clearance when they do not. I have been misquoted by your meddling.
You are trying to change what the federal government has done, not what I want. I am just reporting the new government standard.
If you don't understand it, don't give wrong information. And don't edit my posts to make it look like I gave out the wrong and dangerous information.
The flashing yellow arrow is not just a replacement for the ball green. That's what the ignorant politicians who do not understand it say.
The flashing yellow arrow is the same as the green ball for left turners. But it has a very different meaning for those who are NOT turning left.
THIS is the reason the flashing yellow arrow is replacing the green ball for left turns at some signals.
The green ball can not be shown to left turning traffic without also giving the right of way to straight ahead and right turning traffic. This is why the green ball is often dangerous. It causes yellow trap, but cutting off the left turning traffic at the WRONG TIME.
The flashing yellow arrow can give permissive right of way to left turning traffic when the straight ahead traffic must be stopped. It separates the timing for the left turn from the timing for the straight ahead movement, allowing each one to end at a time when it is safe to do so.
This total separation of right of way is what is necessary to prevent the yellow trap. The exclusively protected signal prevents yellow trap by not allowing permissive turns. Now a safe way to allow permissive turns is available with the flashing yellow arrow. But it can't be done with the circular green.
I repeat the CORRECT current meanings as given by the Federal Highway Administration:
- A steady green arrow gives a protected turn, free from all conflicts except turns on red.
- A flashing yellow arrow gives a permissive turn, made through gaps in oncoming traffic. It gives no permissions to traffic not turning in the direction of the arrow, so it can release the turning movement alone.
- A steady circular green gives a permissive turn, made through gaps in oncoming traffic. It also gives a privileged straight ahead movement. The problem with it is that it also releases traffic moving in other directions, so it can't be used to release just the turning movement (the real reason we need the flashing yellow arrow).
- A flashing circular yellow gives a privileged right of way, but not free from conflict, for those moving straight ahead. It gives a permissive turn, made through gaps in oncoming traffic. (For turns, it means the same as the flashing yellow arrow, but it also gives other permissions to other traffic.)
- A steady circular yellow gives privileged clearance not free from conflict for only straight ahead traffic. It gives a permissive clearance for turning traffic, which must still wait for straight ahead traffic from the opposite direction to clear. (Note that if the oncoming signal stays green, the result is the yellow trap hazard.)
- A steady yellow arrow gives privileged clearance free from conflict, only
when it follows a steady green arrow.
- A steady yellow arrow gives permissive clearance for turning traffic when it follows a flashing yellow arrow, because the opposing circular indication is also yellow at the same time. Thus, those clearing from a flashing yellow arrow must still wait for straight ahead traffic from the opposite direction to clear.
(This is exactly like the steady circular yellow, except that a circular yellow is not allowed to be shown in that direction at that time.) This is now the federal standard.
- Flashing red (circular or arrow) means stop, and proceed when the way is clear.
- Steady red (circular or arrow) means stop and stay, unless turns are permitted on red.
Now, look at what we miss out on if we don't have the flashing yellow arrow:
- We lose freedom from the yellow trap hazard without the flashing yellow arrow. The flashing yellow arrow can continue to flash after the straight ahead signal turns yellow and red. It flashes until the oncoming circular green ends. Without it, a signal that skips the cross street causes yellow trap without special preventative measures.
- We lose the lead-lag left turn sequence with permissive turns. Without the flashing yellow arrow, all lead-lag sequences have to stop turning traffic with red arrows, except when released for protected turns. The circular green permissive turn used in a lead-lag signal causes yellow trap on every cycle, so it is banned.
- We lose green light progression (the signals turn green as you come to them) on many two-way streets that could have it with the flashing yellow arrow. The lead-lag sequence is needed to make this progression possible. And only the flashing yellow arrow makes the lead-lag sequence work with permissive turns.
- We lose the gasoline savings the flashing yellow arrow gives us from the decreased idling time at intersections (left turns have more time to turn through gaps).
- We lose the gasoline savings from the green light progression on many streets that could have it. Without the flashing yellow arrow, there is no green light progression on those streets. It can't be done.