A simple retrofit to existing street lights would be to install filters over them which very slightly change their shape.
I suggest green become an upward pointing arrow shape, yellow slightly resembling a turtle, and red as an actual octagon instead of all being round.
-- 2 fries shy of a happy meal, Nov 16 2023

Tram signals https://www.legisla...dule/14/part/3/made
For [marklar] [pocmloc, Nov 17 2023]

Green is often an arrow for filter purposes. Could easily be extended.

I understood the vertical positioning was the main cue
-- pocmloc, Nov 16 2023


Trams use a simple white line. I don't know what all the angles mean and I refuse to get my tram license just so I can annotate authoritatively. But, you could ask a 6-year old and they'd probably guess most of them.
-- marklar, Nov 16 2023


I would have thought that all forms of terrestrial traffic signalling would be new to a turtle. They do, of course, have their own method of findication between themselves, which allows them to communicate 3-dimensionally, as they must do. Unfortunately, the complex subtleties of this finformation do not translate to our realm, despite the best efforts of Tesla engineers, so far at least
-- marklar, Nov 16 2023


Not to me.
-- 2 fries shy of a happy meal, Nov 17 2023


I did. Both here and out there.

Show me where existing street lights can be modified without infrastructure changes.

The idea is to retrofit existing lights so as to not bilk taxpayers for an overhaul.
-- 2 fries shy of a happy meal, Nov 17 2023


[marklar] its much simpler than I had guessed - basically go ahead, turn left, turn tight, stop.

Don't be put off getting your tram license just by my google skills though. You know you secretly want to.
-- pocmloc, Nov 17 2023


//street lights// sp. traffic lights.

Street lights are a different thing.

Carry on
-- pocmloc, Nov 17 2023


Pareidolians Unite! They are trying to take our meaningless perceptions of imaginary visions and permanently crystallize them into actual, fully-baked products! This business with the traffic lights is the first in a calculated plan to objectify and make functional our sacred subjective bullshit! What will become of the unicorns in the clouds! What about Jesus on the toast? And the Holy Mother on the glass walls of the bank? Rise and defend our right to see shit where there is nothing! The future of our political system depends on it!
-- minoradjustments, Nov 17 2023


This idea is useless because it will not help blind drivers. Suggest a beeping noise or rotating cone like is used for pedestrian crossings.
-- pocmloc, Nov 17 2023


Of course the natural consequence will be people wondering why turtles were chosen to mean "go faster before the light changes."
-- RayfordSteele, Nov 17 2023


[pomloc], I am confident enough in my trambulatory abilities that I could talk my way into such an esteemed position. If I have learned anything from politics, it is that. But while I can go ahead like a professional, turn left like a natural, and my ability to stop has rarely been questioned, televised politics and the school of life have been unable to adequately instruct me in the art of turning tight. It is this most difficult of skills, while piloting a railed vehicle, that requires the full doctrine of the mandatory half-day of tram school with lunch buffet.

[RayfordSteele] Everyone knows that Turtle Wax makes your car go faster, so the association is simple.
-- marklar, Nov 17 2023


More challenging variation; synaesthetolights: These must detect the particular synaesthetic mappings of each approaching driver, and generate a sound or smell equivalent to red, amber or green. Interesting clashes ensue.
-- pertinax, Nov 18 2023


[marklar] The secret is to go very very slowly, and listen carefully to the squealing noise of the flanges on the rails.
-- pocmloc, Nov 18 2023



random, halfbakery