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Thread: Four-lane roundabout planned

  1. #1
    Cyburbian Richmond Jake's avatar
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    Four-lane roundabout planned

    I don't remember ever traveling through a four-lane roundabout. This should confuse the rednecks.

    The short video is cool.

    http://www.newsherald.com/news/20171...ional-entrance
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  2. #2
    Super Moderator luckless pedestrian's avatar
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    Isn't that a Rotary, not a roundabout?
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  3. #3
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    that's not a bad roundabout, we have several of these in town on our major arterials and they work great versus lights and stop signs

  4. #4
    Cyburbian WSU MUP Student's avatar
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    We have a few 6 lane (and a bunch of 4 lane) roundabouts and rotaries here in Metro Detroit with more on the way. There is one area where two or three communities have a whole bunch of the roundabouts in close proximity to each other on some heavily trafficked roads and when they first started putting them in, everybody found something to complain about but eventually people got used to it. I cannot remember if the number of accidents actually decreased but I know that the severity of accidents is significantly less because everybody is (hopefully) moving in the same direction and at continuously similar speeds so there should be no head-n or t-bone accidents.

    The one problem that we did run into after they were put in is that the engineers don't want to put in timed crosswalk signals because that stops traffic flow, which goes against the entire concept. So for pedestrians, not only does traffic not stop, but because of the design they often have double the number of lanes of traffic to cross. IIRC, the communities did finally convince the road commission to add HAWK Beacons to some of the crosswalks that have heavier pedestrian traffic.

    We also have a diverging diamond interchange where an interstate, a major highway, and a major arterial street all come together. That one was pretty crazy but it really does help the traffic move.

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  5. #5
    Cyburbian Doohickie's avatar
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    Quote Originally posted by JLyon View post
    that's not a bad roundabout, we have several of these in town on our major arterials and they work great versus lights and stop signs
    We have the most mucked up traffic circle (calling it what it is, trending names aside). Depending on where you enter, either the existing circle traffic has the right of way and entering traffic has to yield, or the other way around. It's just st00pid.

    I've seen roundabouts in Europe that are traffic light regulated and still deliver efficient traffic flow; the one near us needs that kind of treatment I think.

    /endrant

  6. #6
    Cyburbian RandomPlanner's avatar
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    Quote Originally posted by WSU MUP Student View post
    ...

    We also have a diverging diamond interchange where an interstate, a major highway, and a major arterial street all come together. That one was pretty crazy but it really does help the traffic move.

    From a Planner perspective, I suppose I get the concept behind these but in real life, I just can't wrap my head around it. There are some in ATL. I hate them.
    How do I know you are who you think you are?

  7. #7
    Cyburbian WSU MUP Student's avatar
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    Quote Originally posted by RandomPlanner View post
    From a Planner perspective, I suppose I get the concept behind these but in real life, I just can't wrap my head around it. There are some in ATL. I hate them.
    I think I looked at it opposite as you did - on paper, I just don't get it but the first time I drove through it I was amazed at how well it functioned and how everybody moved through so seamlessly.
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  8. #8
    Cyburbian dvdneal's avatar
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    There was one proposed at my last job. It took me a while to understand it, but it's supposed to flow extremely well. I've just never actually seen one.
    I don't pretend to understand Brannigan's Law. I merely enforce it.

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