Roundabouts are catching on, and MnDO...

Roundabouts are catching on, and MnDOT says they're helping make roads safer

Posted in the Minneapolis Forum

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Consistent

Minneapolis, MN

#1 May 28, 2013
Roundabouts are becoming the most popular thing on Minnesota roads since dotted white lines.

There are more than 115 of the circular intersections statewide, and an additional 39 are planned or under construction.

The state champion? Woodbury -- with 11 roundabouts built, planned or under construction, more than any other city.

As more are built, a growing amount of data is proving that roundabouts save lives and increase the flow of traffic. The Minnesota Department of Transportation is looking for more opportunities to build them.

"The data show that they are the safest intersections we have," said Ken Johnson, a roundabout expert at MnDOT.

How safe are they? Johnson says they are one reason the state's highway fatalities are dropping.

No one has proved a connection, but fatalities started falling four years ago, which is about when the state's roundabout building binge began.

Typical is the state's first roundabout, built near New Prague seven years ago.

The intersection had been the site of two deaths and 50 injury-causing accidents in five years. But since the roundabout was installed, there have been no fatalities and only four injury crashes.

That is in line with statistics from the U.S. Transportation Department, which says roundabouts reduce fatalities by 90 percent.

Nationally, multilane roundabouts have roughly the same number of accidents as signal-controlled intersections but 70 percent fewer injury-causing accidents.

That's

because roundabouts not only change how often cars crash, but how they crash.
A typical intersection has traffic crossing at right angles. If a drunk driver speeds through a red light, he can hit the most vulnerable part of a car -- the side.

"Roundabouts eliminate that kind of crash," said Washington County engineer Wayne Sandberg.

Traffic must slow down to enter the roundabout. If vehicles collide, they are more likely to be going in the same direction.

Besides safety, the other primary advantage of roundabouts is speed.

During rush hours, MnDOT's Johnson said, cars travel through roundabouts an average of 10 seconds faster. In nonpeak hours, traffic slows only slightly at a roundabout instead of making a full stop at a red light, night or day.

Roundabouts do have some drawbacks.

"They are not a silver bullet for every intersection," Sandberg said.

The circular centerpiece requires more land than a regular intersection.

They don't work as well when a busy highway crosses a smaller street. When one of the intersecting roads carries 90 percent of the total traffic, then engineers prefer other kinds of intersections.

Overall, roundabouts cost about the same as intersections with lights -- usually between $1 million to $1.5 million. But the long-term operational costs are lower.

Roundabouts are better for the environment. They consume no electricity, and they avoid pollution from idling cars at stoplights.

They have less paved area, which means that pollution-bearing runoff is reduced. In a conventional intersection of four-lane roads, the additional turn lanes can make roads seven lanes wide where they meet.

"Those intersections are like a sea of pavement," Johnson said. And the turn lanes must begin well before the intersection.

One reason roundabouts are on a roll is because drivers are getting used to them.

When roundabouts first became common, so many drivers were nervous about using them that Washington County decided to teach drivers directly.

It established Roundabout U, an outreach program teaching navigational skills. In addition, Sandberg said, drivers' education programs have been encouraged to include segments on roundabout driving.

The result is more acceptance. Woodbury is the state's roundabout champ partly because of a recent survey in which residents said they liked roundabouts, Sandberg said.

Roundabouts also proliferate in fast-growing suburbs because new roads are being built.
Im not a Crook

Saint Paul, MN

#3 May 28, 2013
I like them, when there's no traffic I blow through with no regard for the circle painted lanes.

Oh I know it's against the law but who gives a phock?

Since: Oct 08

Location hidden

#4 May 28, 2013
I find them annoying in some respect, because like a 4 way stop, some people just can't figure out when to go.
Bushwhacker

Seattle, WA

#5 May 28, 2013
Well, you did buy TGT & make 20%, while I made @ 170% on Immr. Stupid is as STOOPID does....

BTW- I see no picks from the cowardly crew, yeah that's YOU !!!! LMAOROFU ~!

Smart Liberal

“The one and only Smart Liberal”

Since: Aug 12

Former MN Tax Payer

#6 May 28, 2013
If anyone has ever driven in Washington DC during rush hour, you would know how stupid these things are.

It is the driving equivalent of playing soccer. They serve no purpose and are stupid.
non-starter

Saint Paul, MN

#7 May 28, 2013
Smart Liberal wrote:
If anyone has ever driven in Washington DC during rush hour, you would know how stupid these things are.
It is the driving equivalent of playing soccer. They serve no purpose and are stupid.
I think the one going out to Cape Cod in Massachusetts is really annoying.

Since: Sep 11

Rogers, MN

#9 May 28, 2013
Smart Liberal wrote:
If anyone has ever driven in Washington DC during rush hour, you would know how stupid these things are.
It is the driving equivalent of playing soccer. They serve no purpose and are stupid.
I first encountered them in Boston. I didn't like them there and don't care for them here either. Like NoTA said, the problem is not how intersections are designed but rather, how people ignore the rules of he road. Like actually stopping for a stop sign. Have you seen how people in Minnesota don't seem to have much concept of how to behave at a 4 way stop or when the red lights are flashing?

Smart Liberal

“The one and only Smart Liberal”

Since: Aug 12

Former MN Tax Payer

#13 May 28, 2013
Smarter Liberal wrote:
<quoted text>
We'd all be driving horse and buggies, reading by whale oil light, and flat broke if we listened to you.
Dumbo, you are conveniently avoiding taking credit for your lie (or inadvertent untruth) on the GNP comment you made earlier.

Oh, well. I know it is asking a lot for you to do anything other than parrot the Talking Points e-mail you received this morning.

Now, as for your comment above, you are flat broke. What are you talking about? You are a moocher. A leech on the productive members of society.

And if you had listened to me (stay in school, get married to your boyfriend or girlfriend only after you can afford to live on your own, don't have children until you can afford them, be honest in your dealings with your boss and your customers, and work hard) you would be a rich Conservative today.

Your loss.
Smarter Liberal

Seattle, WA

#14 May 28, 2013
They serve no purpose and are stupid.

PERFECT IRONY, FROM THE COWARD !!!

We'd also have watched Cain the pizza perv run for office !!!! LMAOROTFU~!!!

Smart Liberal

“The one and only Smart Liberal”

Since: Aug 12

Former MN Tax Payer

#16 May 28, 2013
Smarter Liberal wrote:
So you think making up stories about people you don't even know makes you a man?
Especially when you know that the truth is otherwise.
But we expect lies from you, nothing new.
Who is making up stories?

"We'd all be driving horse and buggies, reading by whale oil light, and flat broke if we listened to you."

You are dumber than a box of rocks. There is no one on Topix more involved in technology than I am. That is where I make a living, sonny boy.

Another lie (or inadvertent untruth) from the name jacker who hides behind the name of people smarter than he will ever be.

Now, you gonna come back and explain your lie about the GNP?

Perhaps it is better just to leave that topic alone and let everyone know you were not bright enough to know that what you said was a complete fabrication.
Seattle Slew

Neenah, WI

#17 May 28, 2013
I like roundabouts. They remind me of one giant brown ring. I just go round and round and round.
Bushwhacker

Seattle, WA

#18 May 28, 2013
Poor gay crapass.... Life passed you by and the horn blowing was a wet fart from Space Case....
The Truth

Minneapolis, MN

#19 May 29, 2013
Smart Liberal wrote:
<quoted text>
Who is making up stories?
"We'd all be driving horse and buggies, reading by whale oil light, and flat broke if we listened to you."
You are dumber than a box of rocks. There is no one on Topix more involved in technology than I am. That is where I make a living, sonny boy.
Another lie (or inadvertent untruth) from the name jacker who hides behind the name of people smarter than he will ever be.
Now, you gonna come back and explain your lie about the GNP?
Perhaps it is better just to leave that topic alone and let everyone know you were not bright enough to know that what you said was a complete fabrication.
http://www.taxpolicycenter.org/taxfacts/displ...

Smart Liberal

“The one and only Smart Liberal”

Since: Aug 12

Former MN Tax Payer

#20 May 29, 2013
The Truth wrote:
OK, I apoogize in advance to everyone because I do not mean to hijack this thread, but Dumbo posted a link to prove a point he tried to make yesterday.

Do you F-ing believe it? He posted a link to something instead of just copying his Daily Talking Points e-mail.

Now...to what you said...here is your original post:

"Did you know that the federal tax as a percentage of the GNP is today the lowest it has been since shortly after the end of World War II?"

http://www.topix.com/forum/city/minneapolis-m...

I responded with:

1. You use the term GNP, but you really are talking about GDP. There is a difference between the two.
2. Your comment is wrong. 2009, 2010, and 2011 were all lower than it is today.

Then you come along and post a link to prove your point. Your post proves you wrong.

It also proves me right.

WTF is with you? Do you enjoy showing the world how stupid you are? I have a feeling this will be the last time you ever post a link to anything.

As I have said many times, facts are not your friend. Now, stop reading and parroting the DNC Talking Points memos. Think for yourself for once.
More Plantation Carnage

Grantsburg, WI

#22 May 29, 2013
More CON Carnage wrote:
They serve no purpose and are stupid.
PERFECT IRONY, FROM THE COWARD !!!
Slewblomkin,

A reminder, in case you have forgotten.

The Sociopath comes on here, and talks about;

Bending Little BOI's over

Buggering Bycycle Seats

Assaulting other Posters in the Mystical DOJO

His Gay Porn Collection

His Homophobic Rants between him and Red Reamer

She enjoys Revealing her Disturbed Violent and Despicable Sexual Fantasy's all day every day

Nobody can figure out the meaning of your psychotic recitations, but you keep posting anyway!

Why?

Since: Oct 08

Location hidden

#24 May 29, 2013
Smarter Liberal wrote:
So you think making up stories about people you don't even know makes you a man?
Especially when you know that the truth is otherwise.
But we expect lies from you, nothing new.
Which part was untrue?

Since: Oct 08

Location hidden

#25 May 29, 2013
Smart Liberal wrote:
<quoted text>
OK, I apoogize in advance to everyone because I do not mean to hijack this thread, but Dumbo posted a link to prove a point he tried to make yesterday.
Do you F-ing believe it? He posted a link to something instead of just copying his Daily Talking Points e-mail.
Now...to what you said...here is your original post:
"Did you know that the federal tax as a percentage of the GNP is today the lowest it has been since shortly after the end of World War II?"
http://www.topix.com/forum/city/minneapolis-m...
I responded with:
1. You use the term GNP, but you really are talking about GDP. There is a difference between the two.
2. Your comment is wrong. 2009, 2010, and 2011 were all lower than it is today.
Then you come along and post a link to prove your point. Your post proves you wrong.
It also proves me right.
WTF is with you? Do you enjoy showing the world how stupid you are? I have a feeling this will be the last time you ever post a link to anything.
As I have said many times, facts are not your friend. Now, stop reading and parroting the DNC Talking Points memos. Think for yourself for once.
Crickets, Crickets Wonder the wonder boy Truth is after you shoved his DNC talking points down his throat with actual facts!! Nice work Smart Liberal
Bushwhacker

Seattle, WA

#26 May 29, 2013
Well, you did buy TGT & make 20%, while I made @ 170% on Immr. Stupid is as STOOPID does....

BTW- I see no picks from the cowardly crew, yeah that's YOU !!!! LMAOROFU ~!

Is it satisfying to pretend success, when reality bites YOU ?? Just wondering....
Obama says Im not a crook

Saint Paul, MN

#27 May 29, 2013
Install a roundabout at 120 and 36 in Oakdale. MnDOT refuses to install an overpass, maybe the druggies will install a roundabout.
Bushwhacker

Seattle, WA

#28 May 29, 2013
Maybe the 787 will fly over and you'll keel over....

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