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by **RunsWithCrouse-Hinds** on Sat Aug 10, 2013 6:53 pm

coyttl wrote:
adamfishercox wrote:What? If you're in the roundabout, traffic on the right is those entering the roundabout. You yield to them.

No,
People ENTERING the roundabout yield to people already IN the circle.

If it was your way, then the circle would get full, and noone would be able to exit.

I think the person who wrote the article got their info from British traffic regulations... :grin:

by **wynnm1951** on Sat Aug 10, 2013 7:53 pm

I, too, hate round-abouts. How can you yield to someone turning right if you are turning left? Doesn't everyone travel in the same direction? Turn right to enter and turn right to exit. I always thought you had to travel 3/4 of the way around if you wanted to go left. Have I been doing this all wrong?

by **LarryC39** on Sat Aug 10, 2013 9:34 pm

I hate american roundabouts. They're poorly signed, marked, and the drivers in them are idiots.

Never had a problem with the ones in the UK though. Even had quite a few with traffic signals. :Phil:

by **signalstand** on Sun Aug 11, 2013 10:19 am

Living close by to the mountain communities I deal with these all the time. Pretty much from Rifle to Georgetown they are the latest craze. Check this one out in Rifle at the interchange of I-70 and CO 13. https://maps.google.com/?ll=39.522714,- ... 5&t=k&z=17

And they get worse the closer you get to the mountains. And if that one isn't bad enough, check this project out http://www.coloradodot.info/projects/i7 ... unctionddi

by **adamfishercox** on Thu Aug 15, 2013 2:58 pm

coyttl wrote:
adamfishercox wrote:What? If you're in the roundabout, traffic on the right is those entering the roundabout. You yield to them.

No,
People ENTERING the roundabout yield to people already IN the circle.

If it was your way, then the circle would get full, and noone would be able to exit.

I'm not saying that it would work, I'm saying that's what yielding to the right would mean.

by **traffic-light-man** on Fri Aug 16, 2013 5:15 am

adamfishercox wrote:
coyttl wrote:
adamfishercox wrote:What? If you're in the roundabout, traffic on the right is those entering the roundabout. You yield to them.

No,
People ENTERING the roundabout yield to people already IN the circle.

If it was your way, then the circle would get full, and noone would be able to exit.

I'm not saying that it would work, I'm saying that's what yielding to the right would mean.

Until relatively recently, this was how standard French roundabouts worked - Priorité à droite.
I'm not sure how they stopped them from snarling up though!!!

This one is still marked out as such, as I observed the other day whilst in Paris. It seemed that not a lot of traffic actually made a left hand turn at this one though, so it didn't matter much.

Whilst quite rare in the UK, we have some where one arm of the roundabout has priority, but these are often the lesser-trafficked movement so it's no too bad. Here's an example that I use regularly.

by **cjsebes** on Sat Aug 17, 2013 4:39 pm

It seems that New Jersey has been known for its traffic circles and I've had my share of driving through a few of them.
http://en.wikipedia.org/wiki/List_of_traffic_circles_in_New_Jersey

What annoys me the most is that in most of the traffic circles that I've driven through in NJ, the traffic IN the circles had to yield to those entering the circle, which is bass ackwards. To regulate this, traffic lights were installed to meter the traffic entering the circle. I'm not sure whose brain-swell idea that was. More so than not, I've seen other circles, at least in other countries, have those entering the circle yield to those already in.

YouTube · by **signal-in-the-box** on Sat Aug 17, 2013 9:52 pm

^ from that page... what kind of sign is this?? I know I saw them on some "strangest signs" list....
http://upload.wikimedia.org/wikipedia/c ... circle.jpg

On the circles topic, there are 4 along the 5 mile trip to my closest grocery store... 2 of which used to be regular intersections, and the other two did not exist at all...
The first two circles are sometimes helpful. The other two are not neccesary at all; they are on two different roads without much traffic, and currently only connect to each other. All they do is hold up through traffic.

by **traffic-light-man** on Sun Aug 18, 2013 6:46 am

This is a common sight on UK roundabouts - on a simple 4-way roundabout, the signals often essentially work as a protected right turn using only 2 stages as right turning traffic is stacked on the roundabout. It gets more complicated when you start factoring in traffic patterns or more arms to the roundabout and as such, SCOOT and MOVA detection and optimisation packages are available for roundabouts. There are also softwares to help programme signals for roundabouts (as well as standard junctions).

We have a software from the Transport Research Laboratory called ARCADY for designing roundabouts - the Indiana DOT has adopted this too, according to the TRL website.

There's also some interesting images in this PowerPoint that's been converted to PDF. Mott McDonald is a major highways consultancy firm (amongst other things), and this is a basic check-list on how to design a roundabout.

This is another technique which isn't too rare here in the UK - pushing a main movement through the centre of the island...

by **EPAC-EPIC-MARC** on Sun Aug 18, 2013 11:10 am

I hate large roundabouts! I will also go out of my way just to avoid them.

The one at the Van Dyke/M-53 split off is one of the worst in my area. You have people coming off the freeway at 65 mph, accelerating to get on the freeway, staying on the Van Dyke surface street, or jetting off onto 18 1/2 mile..

Three lanes in the circle...I have seen and been part of so many close calls in this thing.

http://goo.gl/maps/WFRPE

10 years ago this was just a four way, 2 phase intersection with signals... and the backups were non existent :glare:

Over-engineered at its finest...

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