[deathhand]

Fed ex avoids left turns - https://www.washingtonpost.com/news/innovations/wp/2014/04/0...

[OnlineGladiator]

It's also a serious consideration for companies working on self-driving cars, as unprotected left turns are extremely difficult for the robots.

[ufmace]

Not too surprising if we think about it. At a significant number of unprotected lefts at busy intersections, you basically have to semi-aggressively pull out in front of oncoming traffic and rely on them to slow down for you in order to get through in a reasonable time. It's tough to automate that in a safe way. Especially if it involves fuzzy value judgements about whether those cars seem like they'll probably slow down for you.

[graeme]

Would be a great navigation mode for maps apps to add. No left turn or easy driving mode. If ups does it, why not others?

[aeyes]

That should just be the default routing unless it's absolutely unavoidable.

[herenorthere]

I think I read an article like this on HN a few months ago, ty for the share