4 ms·

I'm very cautious when making left turns - way more than the average driver. If I'm not I'm liable to screw up in either direction and no one wants that. No o

I'm very cautious when making left turns - way more than the average driver. If I'm not I'm liable to screw up in either direction and no one wants that. No one has managed to rear end me, but I obviously don't have 6.5 million miles driven. And even if they did, I would trade a high speed t-bone for a low speed fender bender any day of the week.

ghaff 6y ago
I've been told by researchers that unprotected lefts are one of the hardest problems for self-driving. They're so situationally dependent and can rely on social signaling. If traffics is light, it's pretty easy of course. But get into congested areas and you pretty much have to be at least somewhat aggressive and even take things like Pittsburgh lefts. And if you're not at least somewhat aggressive, cars behind you can start honking horns and taking dangerous actions because, from their perspective, you're blocking the road. (No criticism intended; you have to do what feels comfortable for you.But it's probably one of the routine driving tasks that takes the most judgement.)
- ponker 6y ago
  I remember once I had a protected left but saw the car coming (hundreds of feet out) and didn't like the look on his face (which was barely visible), like he was too into his music. I didn't take the left and the guy flew through the red light and slammed his brakes halfway through. I think back to that situation when I think of AV.
  - deleted 6y ago
    [deleted]
- kibwen 6y ago
  In case people aren't aware of what a Pittsburgh left is: https://en.m.wikipedia.org/wiki/Pittsburgh_left https://en.m.wikipedia.org/wiki/Pittsburgh_left
  - ed312 6y ago
    I had no idea that wasn’t considered normal! I sometimes even wait a second if I see someone on the opposite side of the intersection with a left turn signal on for just this reason
    - ghaff 6y ago
      It is pretty normal at least in the congested areas I know. (That left is called by a lot of different city names.) But it's not strictly legal because you don't have the right of way to make a turn. But it's one of the zillion things that people do (including jaywalking when it's hopefully safe) that people do in order to get places and, so long as they're not obnoxious or dangerous about it, no one gets either hurt or ticketed.
- BenjiWiebe 6y ago
  I'd say it's the most difficult issue in driving, whether AI or human.

ghaff 6y ago

I've been told by researchers that unprotected lefts are one of the hardest problems for self-driving. They're so situationally dependent and can rely on social signaling. If traffics is light, it's pretty easy of course. But get into congested areas and you pretty much have to be at least somewhat aggressive and even take things like Pittsburgh lefts. And if you're not at least somewhat aggressive, cars behind you can start honking horns and taking dangerous actions because, from their perspective, you're blocking the road. (No criticism intended; you have to do what feels comfortable for you.But it's probably one of the routine driving tasks that takes the most judgement.)

ponker 6y ago
I remember once I had a protected left but saw the car coming (hundreds of feet out) and didn't like the look on his face (which was barely visible), like he was too into his music. I didn't take the left and the guy flew through the red light and slammed his brakes halfway through. I think back to that situation when I think of AV.
- deleted 6y ago
  [deleted]
kibwen 6y ago
In case people aren't aware of what a Pittsburgh left is: https://en.m.wikipedia.org/wiki/Pittsburgh_left https://en.m.wikipedia.org/wiki/Pittsburgh_left
- ed312 6y ago
  I had no idea that wasn’t considered normal! I sometimes even wait a second if I see someone on the opposite side of the intersection with a left turn signal on for just this reason
  - ghaff 6y ago
    It is pretty normal at least in the congested areas I know. (That left is called by a lot of different city names.) But it's not strictly legal because you don't have the right of way to make a turn. But it's one of the zillion things that people do (including jaywalking when it's hopefully safe) that people do in order to get places and, so long as they're not obnoxious or dangerous about it, no one gets either hurt or ticketed.
BenjiWiebe 6y ago
I'd say it's the most difficult issue in driving, whether AI or human.