A new kind of interchange eliminates left turns.
1–10 of 26 posts
Re: A new kind of interchange eliminates left turns.
#2"New" ?? This was discussed 410 days ago:: http://news.ycombinator.com/item?id=1437430
Also just recently re-submitted: http://news.ycombinator.com/item?id=2833446
In particular, here's the WikiPedia article about the design: http://en.wikipedia.org/wiki/Diverging_diamond_interchange
Re: A new kind of interchange eliminates left turns.
#3"New" ?? This was discussed 410 days ago:: http://news.ycombinator.com/item?id=1437430 Also just recently re-submitted: http://news.ycombinator.com/item?id=2833446 In particular, here's the WikiPedia article about the design: http://en.wikipedia.org/wiki/Diverging_diamond_interchange
New to most people; I haven't driven through one yet. And on the timescales of road engineering, pretty much anything novel in the past 20 years that's not yet widespread is still 'new'.
Re: A new kind of interchange eliminates left turns.
#4I live in a town of spectacularly bad drivers so I may be jaded, but I just can't believe folks will "figure this out". People where I live have a hard enough time figuring out what lane they should be in on a straight two lane road let alone merging, signalling, stopping at intersections, one-lane roundabouts, etc.
Re: A new kind of interchange eliminates left turns.
#5They have something similar near the town I grew up:
http://maps.google.com/maps?q=columbus,+in+&hl=en&ll...
It was terrible the first few years. Nobody could ever figure out which lane they were supposed to be in, and ended up driving on the wrong side of the crossed-over section. Granted, the people here are still having trouble figuring out roundabouts, but I found this very confusing my first couple times through the intersection.
Re: A new kind of interchange eliminates left turns.
#6I didn't get very much sleep last night, but it seems like a more complicated solution than just using "jug handles".
Re: A new kind of interchange eliminates left turns.
#7I live in a town of spectacularly bad drivers so I may be jaded, but I just can't believe folks will "figure this out". People where I live have a hard enough time figuring out what lane they should be in on a straight two lane road let alone merging, signalling, stopping at intersections, one-lane roundabouts, etc.
You might think so, but everyone says this everywhere in the world. For example, this is the top argument that people use against the implementation of the generally-safer, higher-throughput modern roundabouts. Without fail, every time a modern roundabout is installed, the exact same thing happens: congestion is eased, the incidence of fatal accidents falls some 90%, and a multitude of people say things like "well, I just couldn't believe that these people where I live were smart enough to handle it, but it worked!"
What people usually attribute to bad driving is usually the fault of poor traffic planning. Humans tend to be the same, circumstances change.
Re: A new kind of interchange eliminates left turns.
#8They started putting in lots of continuous flow intersections in Utah:
http://en.wikipedia.org/wiki/Continuous-flow_intersection
Re: A new kind of interchange eliminates left turns.
#9They started putting in lots of continuous flow intersections in Utah: http://en.wikipedia.org/wiki/Continuous-flow_intersection
The new Pioneer Crossing intersection is great. I drive through it every day.
Here's a video describing the flow: http://www.youtube.com/watch?v=xWHEi8baCPE
Re: A new kind of interchange eliminates left turns.
#10They're in the process of building one of these here in Lexington, KY. The link the the video simulation was definitely enlightening. We'll see whether drivers will actually be able to pick up how to navigate it.