modern roundabout (20)

Testing Addresses Freight Industry Concerns about U.S. Highway 20 Roundabout

April 01, 2015

As the Oregon Department of Transportation (ODOT) planned for a new roundabout on US 20 at Barclay Drive in Sisters, the freight industry expressed concern about whether large trucks would be able to navigate the roundabout safely and efficiently. In order to address those concerns, ODOT recently staged a series of roundabout testing sessions in Redmond and Portland. The first took place at the Deschutes County Fairgrounds, where a variety of truck and trailer combinations were invited to negotiate a test roundabout.

Continue reading »

Roundabout Leadership a Hallmark of KAI

April 16, 2014

When Ed Myers was asked to consider a roundabout for an interchange on the D.C. Beltway 25 years ago, little guidance was available at the time. In those pre-Internet days, few American cities were implementing roundabouts, so he turned to Europe and Australia for examples.

“Primarily what they were finding was there was a pretty significant safety benefit to roundabouts, with a 50 to 80 percent reduction in crashes,” said Ed, now a senior principal in Kittelson & Associates’ Baltimore office.

Continue reading »

New Kansas Roundabout Guide is Ahead of the Curve

April 15, 2014

March marked the release of an important addition to the transportation industry’s collective body of knowledge about modern roundabouts, the Kansas Roundabout Guide 2nd Edition 2014. The document, developed for the Kansas Department of Transportation (KDOT), provides not only information and guidance on roundabouts in that state, but also serves as a valuable resource to transportation engineers and planners elsewhere.

Continue reading »

Too many projects & not enough resources: How to identify & prioritize safety improvements

February 27, 2013

This past week, the Portland office of Kittelson & Associates, Inc. (KAI) hosted an interactive workshop titled, Too many projects and not enough resources: How to identify and prioritize safety improvements. A wide variety of state and local agency staff from Oregon and Washington attended the session, which was facilitated by Brian Ray, PE; Erin Ferguson, PE; and Joey Bansen, PE from KAI.

Continue reading »

Participants explore roundabout options during Fort Lauderdale TES workshop

June 07, 2012

A workshop on the evolution from traffic circles to modern roundabouts and how they enhance safety for all road users recently drew elected officials and transportation professionals from the state, county, and local level to the Broward Metropolitan Planning Organization (MPO) in Fort Lauderdale, Florida.

Continue reading »

Going Round In Circles Over Traffic Fix

September 30, 2011

Written by NPR’s Alex Schmidt

Over the past decade, the number of roundabouts in the U.S. has increased dramatically, from the low hundreds up to the thousands. Modern traffic circles can cut down on commute time and pollution. Studies have shown that they even reduce accidents. And many American cities are planning to put in more. But there are still a few roadblocks in the way of a true roundabout revolution.

Continue reading »

Is the British Roundabout Conquering the US?

July 05, 2011

"A roundabout revolution is slowly sweeping the US. The land of the car, where the stop sign and traffic light have ruled for decades, has started to embrace the free-flowing British circular," writes Tom Geoghegan in an article for the BBC while touring Carmel, Indiana - “The American Roundabout Capital".

Read the entire article at BBC online which provides a unique comparison of roundabouts in the UK vs. the US.

Carmel, Indiana embraces Roundabouts and Encourages Use

May 19, 2011

The Transportation Research Board (TRB) is hosting the 3rd Annual International Roundabout Conference in Carmel, Indiana this week where several Kittelson & Associates, Inc. staff are giving presentations and moderating sessions. A spot on Anderson Cooper 360 (CNN) demonstrated Carmel's roundabouts (the city has over 60!) and other benefits of their use.

Roundabout Myth #4: Roundabouts are Difficult & Unsafe for Pedestrians to Cross

May 05, 2011

Roundabouts have many benefits over stop-controlled and signalized intersections. They have proven safety benefits, often have lower delays, can lead to less traffic, can reduce the need for widening, can reduce speeds in and around the roundabout, and can provide an overall benefit to the surrounding community; however, roundabouts are often misunderstood.

This is the final post in a series that aims at tackling some of the myths related to roundabouts. This one relates to a common misperception concerning the safety of pedestrians. View the video below to debunk the myth!




For more information on roundabouts, including videos regarding other myths, please visit Kittelson.com.

Roundabout Myth #3: Snow plows can't plow a roundabout

May 04, 2011

Roundabouts have many benefits over stop-controlled and signalized intersections. They have proven safety benefits, often have lower delays, can lead to less traffic, can reduce the need for widening, can reduce speeds in and around the roundabout, and can provide an overall benefit to the surrounding community; however, roundabouts are often misunderstood.

This is the third post in a series that aims at tackling some of the myths related to roundabouts. This one relates to a common misperception concerning snow plows. View the video below to debunk the myth!




For more information on roundabouts, including videos regarding other myths, please visit Kittelson.com.

Roundabout Myth #2: Emergency Vehicles Can't Make it Through a Roundabout Quickly and Safely

May 03, 2011

Roundabouts have many benefits over stop-controlled and signalized intersections. They have proven safety benefits, often have lower delays, can lead to less traffic, can reduce the need for widening, can reduce speeds in and around the roundabout, and can provide an overall benefit to the surrounding community; however, roundabouts are often misunderstood.

This is the second post in a series that aims at tackling some of the myths related to roundabouts. This one relates to a common misperception concerning emergency vehicles. View the video below to debunk the myth!




For more information on roundabouts, including videos regarding other myths, please visit Kittelson.com.

Roundabout Myth #1: Trucks & Oversized Loads Can't Fit

May 01, 2011

Roundabouts have many benefits over stop-controlled and signalized intersections. They have proven safety benefits, often have lower delays, can lead to less traffic, can reduce the need for widening, can reduce speeds in and around the roundabout, and can provide an overall benefit to the surrounding community; however, roundabouts are often misunderstood. This is a first in a series of posts that aim at tackling some of the myths related to roundabouts. One of the most common relates to trucks and oversized loads. View the video below to debunk the myth!




For more information on roundabouts, including videos regarding other myths, please visit Kittelson.com.

Kittelson at 2011 TRB Annual Meeting

January 24, 2011

The Transportation Research Board (TRB) kicked off their Annual Meeting in Washington DC this weekend. This one-of-a-kind meeting attracts more than 10,000 transportation professionals from around the globe and this year marks the 90th anniversary of the event. The 2011 program covers all transportation modes, with more than 4,000 presentations in nearly 650 sessions and workshops addressing topics of interest to all attendees—policy makers, administrators, practitioners, researchers, and representatives of government, industry, and academic institutions. More than 85 sessions and workshops will address the spotlight theme for 2011: Transportation, Livability, and Economic Development in a Changing World.

As the Principal Investigator (PI) on many high profile TRB research projects such as, the 2010 Highway Capacity Manual, The Highway Safety Manual, Update to the Roundabout Guide, an many more, Kittelson & Associates, Inc. (KAI), has been a long-time supporter and active participant at the Annual Meeting. KAI is sending nearly 20 people to the event this year and the majority of them are presenting or speaking at the event. A list of KAI workshops and/or committee members is listed below for your reference. We look forward to sharing some wonderful information from the 2011 TRB experience in upcoming posts.

Continue reading »

Applied Roundabout Design Course

September 07, 2010

The advantages of the modern roundabout, including modified and improved design features, are again being recognized, more fully explored, and put to the test in the United States.

Join KAI in partnership with OTREC for an interactive 2-day workshop on the development and design of the modern roundabout.

Continue reading »

States Embrace Roundabouts for Intersections

June 24, 2010

The USA Today recently reported on the increasing number of states across the country who are using roundabouts as an effective and versatile alternative at busy intersections. Kittelson & Associates, Inc is proud to have led an international team of experts in preparing the National Cooperative Highway Research Program (NCHRP) Report 572 (Roundabouts in the United States) that is referenced in the online article.

View the entire USA Today article here.

Performance based analysis can support practical design-based project solutions

April 16, 2010

As communities across the country continue to grow, and federal funds to support our aging infrastructure continue to diminish, public agencies look for new ways to maximize investment dollars with minimal compromise. One key approach is the concept of Practical Design, which was pioneered by the Missouri and Pennsylvania DOTs. On April 15th, Brian Ray, from Kittelson & Associates, Inc. and Dr. John M. Mason, PhD, from Auburn University, co-presented a workshop that focused on how industry trends in performance based analysis can support practical design-based project solutions for planning and design projects. Brian and John provided a summary of current and emerging tools that can aid professionals in evaluating, screening, and selecting project alternative concepts.

Slideshow presentation included.

Continue reading »

Modern Urban Roundabouts

December 18, 2009

Throughout the United States, the number of circular traffic intersections has grown considerably in recent years. Roundabout treatments, as a subset of this category, continues to lead the way with nearly 1000 new facilities built in 2007 compared to less than 200 built just ten years ago. The following presentation created by Kittelson & Associates, Inc. (KAI) provides an overview of modern urban roundabouts.

Slideshow presentation included.

Continue reading »

Research Helps Fuel Improvements in Road Safety

October 19, 2006

What does a safe road look like? Is a safe road one where vehicles, bicyclists, and pedestrians all share the same right-of-way without sidewalks or striped bike lanes? Are the shoulders paved or gravel? Are those shoulders 8 or 10 feet wide? Is it a divided roadway or is it undivided? How many driveways access the roadway in each mile? Are the driveways and intersecting streets controlled by traffic signals, stop signs, or roundabouts? How much do these elements affect roadway safety?

Continue reading »

Refining Roundabouts – The Next Five Years

March 15, 2006

Modern roundabouts are being implemented at an increasing rate in the United States. The limited state of practice has resulted in numerous studies assessing the performance of roundabouts in the United States.

Continue reading »

Roundabout Fever Is Going Around

March 04, 2006

Chances are that a roundabout has been constructed or is being considered somewhere near you. Twenty years ago, this would have been highly unlikely. “Traffic circles” have been in use for over 100 years in the United States. However, the “modern roundabout,” common in other parts of the world for 40 years, has only been introduced in the past fifteen years.

Continue reading »

Latest Posts

Archives

Other Reading