There's something adorable and HHGTG about that whole thing! Reminds me of the robotic Star Liner that refused to take off because of the peanuts hadn't been delivered thus its checklist was incomplete. It had waited eons as its passengers withered to corpses securely locked into the cabin only stating that it was 'statistically likely a new civilisation with peanut packages will arise on this planet'.
It might be the only word I use that I have never considered spelling, so I am grateful that you included it your comment.
That said, I think you are wrong and it should be "uey", "uie," "u-ie," or any other spelling that emphasizes the "u" after which the term is named.
Also "I do not know the answer but I am sure you are wrong" is the most internetish comment I've ever made, so that's two striking experiences for me today.
> U-ie n.
> also U, U-ee, U-ey, U-turn, youie
> (orig. Aus.) a U-turn; thus chuck/bang a U-ie, to make a U-turn.
But yeah, u-turn, not you-turn.
As a former Scripps spelling bee contestant, I've developed a low-grade allergy to commonplace onomotopeic words with no obvious, agreed-upon spelling. Recently I struggled with zhuzh (which has the bonus terror of having an alternate spelling, 'zhoosh') - but I commend OP for having chosen a phonetically parseable spelling over one of your (arguably more appropriate) choices, as I suspect it would have taken a lot longer to divine meaning from.
My etymology makes sense. You can even extend it to the "jouergeois" if you need to describe middle-class foodies.
In this case I am definitely wrong and I blame Canada.
I also toyed with just putting "flip a bitch" but figured some might find that problematic as I'm not entirely sure of it's etymology...
I've had humans do this, when I had no intention of crossing the street because I was just standing at the corner waiting to meet somebody. At least the humans give up after a few seconds, with exacerbated expressions like I'm the one who did something wrong. It would be pretty funny to see a robot car sit there for minutes.
In other words, I'm trying to politely set the groundwork to say I think you are wrong if we assume having pedestrians signal clear dis-intent to cross is a reasonable requirement. Of course, the drivers are also wrong to be exasperated with you so I do think in a sense both parties are wrong :D.)
Only problem I've seen with them is people don't realize that just because you wave them through doesn't mean they will proceed. If a Waymo sees a human on the corner that looks like they will cross it will stop and wait until the heat-death of the universe for them to cross.