Topic: Roundabout junctions (Read 17388 times)

rawr apples · « **on:** January 19, 2009, 11:52:07 PM »

Are there any roundabout junctions outside of New England?
Kinds like these

http://maps.google.com/maps?hl=en&q=I93&ie=UTF8&ll=42.419607,-71.103108&spn=0.010201,0.019312&z=16

I love these, but I havnt seen these outside of New England in this country

deathtopumpkins · « **Reply #1 on:** January 19, 2009, 11:54:28 PM »

Not that I've seen... They're the same basic design as a SPUI, which seems to be preferred around here.

agentsteel53 · « **Reply #2 on:** January 20, 2009, 12:01:35 AM »

there are a couple down here in San Diego. In La Jolla, to be specific. I also see them sporadically elsewhere.

they're huge in Europe of course.

Alex · « **Reply #3 on:** January 20, 2009, 12:02:25 AM »

U.S. 61 and Causeway Boulevard, one of my all time favorite interchanges

Taken 11/20/08.

Darkchylde · « **Reply #4 on:** January 20, 2009, 12:08:18 AM »

I've seen a conventional diamond with roundabouts at the ends in Colorado, I-70 Exit 168.

Alex · « **Reply #5 on:** January 20, 2009, 12:11:24 AM »

Quote from: Darkangel on January 20, 2009, 12:08:18 AM

I've seen a conventional diamond with roundabouts at the ends in Colorado, I-70 Exit 168.

You mean this one

:

John · « **Reply #6 on:** January 20, 2009, 12:12:50 AM »

Those ones are dumbbells, they are also in Ohio and other places. The only time I've seen the one rawr_apples talked about is in this thread and SC4.

deathtopumpkins · « **Reply #7 on:** January 20, 2009, 12:13:47 AM »

I thought they were called dogbones...

John · « **Reply #8 on:** January 20, 2009, 12:24:11 AM »

Yeah I think they are also called that. Who knew, but they are also popular in Ireland. Oh yeah, and before I forget, exit 168 is part of a great road described here

rawr apples · « **Reply #9 on:** January 20, 2009, 12:25:59 AM »

ive heard both, but dumbbells is more prevelent I think. and theyre not really like SPUI's, not by a longshot.

deathtopumpkins · « **Reply #10 on:** January 20, 2009, 12:28:23 AM »

The one you posted is the same basic concept, if you think of a roundabout as a type of intersection.

rawr apples · « **Reply #11 on:** January 20, 2009, 12:30:06 AM »

Still dont get how theyre alike. Roundabouts allow traffic to keep going, and to give way of other cars. SPUI's require all vehicles to stop at certain points

deathtopumpkins · « **Reply #12 on:** January 20, 2009, 12:33:28 AM »

I'm talking about the actual interchange. You get off the ramp in the same place regardless of whether it's a SPUI or roundabout.

V'Ger · « **Reply #13 on:** January 20, 2009, 12:38:47 AM »

I know what he's talking about. There are some in the US, but can't think of where. It's a roundabout placed right on top of an interchange, with the exit ramps leading onto it.

deathtopumpkins · « **Reply #14 on:** January 20, 2009, 12:58:12 AM »

I'm saying that both roundabout interchanges like the one rawr posted in the link at the top of the page and SPUIs like this one (that I drove through a lot.. I used to live off that exit) are exactly identical except for the type of intersection on the bottom. Sorry to confuse anyone.

As for the interchange you mentioned voyager, ~~I actually built one of those a while back in SimCity:~~ Actually, I converted it to a diamond and don't have a pic of the original, but here's one from a SC friend: http://img254.imageshack.us/img254/228/southclearviewoct241512sk8.jpg I've heard it called a volleyball too.

V'Ger · « **Reply #15 on:** January 20, 2009, 01:01:04 AM »

Here you go: http://www.kurumi.com/roads/interchanges/volleyball.html

deathtopumpkins · « **Reply #16 on:** January 20, 2009, 01:01:49 AM »

Ahh... kurumi! I have that bookmarked.

Why didn't I look there...

Alex · « **Reply #17 on:** January 20, 2009, 01:05:08 AM »

There are two volleyballs that I know of: I-476 and U.S. 1 - http://www.northeastroads.com/pennsylvania001/us-001_nb_at_i-476_01.jpg and Interstate 240 at U.S. 70 - http://www.southeastroads.com/north_carolina050/us-070_wb_at_i-240_01.jpg. Both don't belong to this thread though.

V'Ger · « **Reply #18 on:** January 20, 2009, 01:06:09 AM »

Do you know what they're talking about with the roundabout mounted onto an interchange?

deathtopumpkins · « **Reply #19 on:** January 20, 2009, 01:08:18 AM »

I'm getting confused now...

So I think it's best to make this my last post on this thread for now.

rawr apples · « **Reply #20 on:** January 20, 2009, 01:12:42 AM »

Here is a proper example of what im talking about, this one is in the UK

http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=skx0qzh0x4cg&style=b&lvl=1&tilt=-90&dir=0&alt=-1000&scene=7715118&phx=0&phy=0&phscl=1&encType=1

V'Ger · « **Reply #21 on:** January 20, 2009, 01:15:57 AM »

Yeah, they have a few of those in the US.

rawr apples · « **Reply #22 on:** January 20, 2009, 01:17:30 AM »

Just saying, I've never seen them outside of the North East though..there is one in Arlington,VA

Alex · « **Reply #23 on:** January 20, 2009, 01:18:47 AM »

Well the original post was about the rotary based interchanges that are found in New England.

Interstate 93 at Willard Street in Quincy, MA.

The twin-roundabout interchange was mentioned later in the thread, which incorporates roundabouts in place of intersections at the end of the respective off/on-ramps in a conventional diamond interchange.

Maryland 100 Freeway at Meadowbridge Road

Chris · « **Reply #24 on:** January 20, 2009, 03:12:37 AM »

Quote from: agentsteel53 on January 20, 2009, 12:01:35 AM

they're huge in Europe of course.

Yeah, I had to negotiate 5 roundabouts to drive 1.5 miles in my former neighborhood. I hate them now, there are way too much of them in the Netherlands. They're extremely safe though, due to the slow speed, deadly collisions are rare.

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Author Topic: Roundabout junctions (Read 17388 times)