Presentations
Wednesday, April 16

8:00 AM – 9:00 AM

Opening Plenary Session

1) Welcome and Opening Remarks

Moderator: Brian Walsh, Washington State DOT

Presenters

· Gene Russell, Emeritus Professor, Kansas State University, Welcome and Remarks from the TRB Roundabout Committee

· Mike Griffith, Federal Highway Administration Office of Safety, Washington, DC, Welcome and Remarks from Federal Highway Administration

· Linea Laird, Chief Engineer, Washington State DOT, Welcome and Remarks from Washington State DOT

Poster Session 1

Presenters

· Rahmi Akcelik, Akcelik & Associates, Modeling Queue Spillback and Upstream Signal Effects in a Roundabout Corridor

Akcelik Paper

· Lee Rodegerdts, Kittelson & Associates, Inc., Status of Roundabouts in North America

· Ellen Poling, Fehr & Peers, Does it Fit? Considering the Roundabout in a Campus Setting

· N. Nezamuddin, Valparaiso University, Feasibility Study of a Multilane Roundabout in Valparaiso, Indiana

· Craig Lyon, Persaud and Lyon Inc., A Model for Average Speed Estimation and Crash Prediction Using Design Vehicle Path Data

Lyon Paper

· Katsunori Fujioka, Oriental Consultants Co.,Ltd., An Innovative Example of Roundabout Implementation in Iida City, Japan

· Mark Lenters, GHD Inc., Capacity Effects of Converting Rotaries to Roundabouts

· Paul Chan, Traffic Solutions Consulting Ltd., Research on Roundabout Applications on Various Transportation Systems in Multiple Cities and Countries

Poster Session 2

Presenters

· Nan Kang, Nagoya University, Japan, Estimation of roundabout entry capacity considering the impact of pedestrians

· Haizhong Wang, Oregon State University, Roundabout Capacity Models: From Deterministic to Stochastic

· Dan Dovey, King County DOT, Washington, Radial or Offset Left Entries – What Really Controls Speed?

· Hideki Tatematsu, Oriental Consultants Co., LTD, Analysis of Eye-mark Recorder Data Collected at Towacho Roundabout in Iida City

· Hillary Isebrands, Federal Highway Administration, The True Story of Roundabouts with High Speed Approaches

· Christoff Krogscheepers, ITS Engineers, The Development of a Roundabout Policy for the Western Cape Government, South Africa

· Zachary Bugg, Kittelson & Associates, Inc., A Methodology to Compute Roundabout Corridor Travel Time

· Mike Hawkins, Fehr & Peers, Using the Versatility of VISSIM to Model the Versatility of Roundabouts

· Troy Pankratz, GHD Inc., Design Considerations for 5 and 6 leg Roundabouts

· Rob Livingston, Transoft Solutions Inc., Study of Roundabout Grading to Accommodate Lowboys Using Computer Modelling

9:45 AM – 11:30 AM

Breakout Sessions

2A) Driver and Other User Behavior Relationship to Capacity/Safety

Moderator: Kelli Owen, Reid Middleton

Presenters

· Michael Hunter, Georgia Institute of Technology, Georgia Roundabout Model Calibration

· Kun Zhang, DPTI, Government of South Australia, An Innovative Dual Roundabout - Design Drives Behaviour Change

Zhang Paper

· Nathan Belz, University of Alaska – Fairbanks, Cellular Automata and the Influence of Driver Behavior at Roundabouts

· Hiroyuki Kageyama, Civil Engineering Research Institute, Japan, Driving Behavior Analysis at Roundabouts under Snowy and Dry Road Conditions

Kageyama Paper

2B) Evaluation Elements of Roundabout Intersection Choices

Moderator: Jerry Champa, California DOT

Presenters

· Michelle Stevens, Felsburg Holt & Ullevig, Blending a Roundabout into an Art District in Lakewood, Colorado

Stevens Paper

· Koji Suzuki, Nagoya Institute of Technology, Japan, Subjective Evaluation for Driving Conditions at Roundabout by Before-After Analysis

Suzuki Paper

· Alek Pochowski, Kittelson & Associates, Inc., Intersection Control Evaluation Implementation

2C) Metering and Other Operational Considerations for Roundabouts

Moderator: Ken Sides, City of Clearwater, Florida

Presenters

· Bastian Schroeder, ITRE at N.C. State University, SuperCircles: Using a Part-Time Entry Signal to Create All-Day Operational and Safety Benefits at Intersections

· L.G.H. (Bertus) Fortuijn, Delft University of Technology, The Netherlands, Robustness of Roundabout Metering Systems (RMS)

Fortuijn Paper

· A. Maria Salomons, Delft University of Technology, The Netherlands, Optimizing the Traffic Control of Signalized Turbo Circles

· Bill Baranowski, RoundaboutsUSA, Roundabouts Located Near Traffic Signals

Baranowski Paper

1:00 PM – 2:45 PM

Breakout Sessions

3A) Constructing Roundabouts, Work Zone Design and the Use of Temporary Roundabouts

Moderator: Scott Zehngraff, Georgia DOT

Presenters

· Kevin House, Parametrix, Inc., Lessons in Scripting the Construction Sequencing Dance

· Jennifer Atkinson, Leidos, Temporary Traffic Control for Building and Maintaining Single and Multi-Lane Roundabouts

· Nathan Beauheim, City of Cheyenne, Wyoming, Constructing the Pershing / Converse / 19th Roundabout in the Middle of Cheyenne, Wyoming

· Shane King, Olsson Associates, Temporary Roundabout in Work Zone

· Jay VonAhsen, Kimley-Horn and Associates, Inc., Recent Challenges with Modern Roundabout Construction

VonAhsen Paper

3B) Unique Roundabout Applications - Case Studies PART 1

Moderator: Martina Wilkinson, Larimer County, Colorado

Presenters

· Daniel Spann, RPM Transportation Consultants, LLC, A Case Study of the Music Row Roundabout in Nashville, Tennessee

· David A. Henkel, CHA Consulting, Inc., Heading Home - The Story of the US 31 Mega-Project

· Alan Woodmansey, Federal Highway Administration, Montana Division (no audio), Montana's Roundabout Corridor: Convincing the Stakeholders and Ourselves

· Christopher Tiesler, Kittelson & Associates, Inc., Gilberts Corner (US 50 / US 15) Roundabout Retrofit

· Becky Bucar & Dan Wilkins, Town of Truckee, California, Policies, Planning and Strategies to Fund Roundabouts

3C) Safety: From HSM and State Safety Summaries of North America to Context for Needed Illumination

Moderator: Alek Pochowski, Kittelson & Associates, Inc.

Presenters

· Clayton Rudy, McElhanney Consulting Services Ltd., Long-term Trends in Safety Performance at Roundabouts

· Andrea Bill, University of Wisconsin-Madison, and Ghazan Khan, California State University – Sacramento, Safety Evaluation of Wisconsin Roundabouts

· Franklin Gbologah, Georgia Institute of Technology, Evaluation of Roundabout Illumination and Safety (not published)

· Andrew Duerr, GHD Inc., Statewide Roundabout Implementation Using the HSM Implementation Plan as a

3:15 PM – 4:45 PM

Breakout Sessions

4A) Truck Accommodations / Considerations at Roundabouts

Moderator: Daniel Spann, RPM Consultants

Presenters

· Amanda Ruksznis, Reid Middleton, Inc., Trucks and Roundabouts: Friends or Foes?

· Scott Ritchie, Roundabouts & Traffic Engineering, Accommodating Trucks at Multi-Lane Roundabouts

4B) Larger Policy, Planning, and Design Aspects of Roundabouts

Moderator: Jeanette Taylor, Jacobs

Presenters

· Phil Rust, City of San Diego, California, Greasing the Skids and Shifting into Overdrive

· Michael MacDonald, Hatch Mott MacDonald, Development of the Canadian Roundabout Design Guide

· Mark T. Johnson, MTJ Engineering, LLC, and Ken Sides, City of Clearwater, Florida, Implications of Modern Roundabouts for Communities and Roadway Planning Standards
Mark Johnson
Ken Sides

· Frank Broen, Certified Roundabout Champions, Certified Roundabout Champions

4C) Bicycle Design, Path Tendencies, and Accommodation of Vulnerable Users

Moderator: Robin Lewis, City of Bend, Oregon

Presenters

· Rachel Price, Reid Middleton, Bike Lane Ends…Now What?

· Hiroshi Kobayashi, National Institute for Land and Infrastructure Management, Japan, Experimental Validation of Appropriate Bicycle Traveling Method in Urban Roundabouts

· Brad Shea, HDR Engineering, Pedestrian and Bicycle Accommodation at Roundabouts

· Colin Ridding, Mott MacDonald, Vulnerable Road Users at Roundabouts in the UK

Thursday, April 17

8:00 AM – 9:45 AM

Breakout Sessions

5A) Pedestrian Design, Accessibility, and Driver Yielding Studies in the U.S. and Other Countries

Moderator: Hillary Isebrands, Federal Highway Administration

Presenters

· Hidekatsu Hamaoka, Akita University, Japan, Comparison of the Head-Turning Behavior of Pedestrians in Japan

· Janet M. Barlow, Accessible Design for the Blind, Roundabouts and Pedestrians who are Visually Impaired

· Katy Salamati, ITRE at N.C. State University, A Cross-Cultural Study of Driver Yielding Behavior to Pedestrians at Roundabouts: An American-Portuguese Comparison

5B) Agency Policy Development for Roundabouts

Moderator: Matthew Enders, Washington State DOT

Presenters

· Andy Boenau & Chris Tiesler, Timmons Group & Kittelson & Associates, Inc., Developing Statewide Roundabout Guidance in Virginia

· Martin Hétu, WSP Canada Inc., Current Situation of Roundabouts in the Province of Quebec

· Andrew Cibor, Ada County Highway District, Idaho, Countywide Roundabout Right-of-Way Preservation Plan

Cibor Paper

· Justin Bansen & Frank Sullivan, Kittelson & Associates, Inc. & Florida DOT, Roundabouts in Florida: A 2014 Update

· Brian Walsh, Washington State DOT, Washington State DOT's Roundabout Program - A Chronological Timeline of Successful Intersection Implementation

5C) Modeling Capacity, Calibrating, Performance and Operational Evaluation of Roundabouts – Individual Intersections and Corridors

Moderator: Doug McClanahan, Washington State DOT

Presenters

· Andrea Bill, University of Wisconsin-Madison, Operational Evaluation of Roundabouts at Ramp Terminals

· Majed Al-Ghandour, North Carolina DOT, (Paper Only) Experimiental Analysis with a Scramble Large Volume of Pedestrians in Single-Lane Roundabout Slip Lane

· Lee A. Rodegerdts, Kittelson & Associates, Inc., Overview of NCHRP 03-100: Evaluating Performance of Roundabouts in Corridors

· Andrea Bill, University of Wisconsin-Madison, Comprehensive and Numerical Calibration Guideline for VISSIM Roundabout Models

10:00 AM – 11:45 AM

Guided Roundabout Tour – YOUTUBE VIDEO

Participants will visit two multi-lane roundabouts and one single lane roundabout in Bellevue and Issaquah, WA. The three roundabouts have many different design/operations innovations, including: bypasses, hybrid circulating lane configurations, teardrop shapes, internally illuminated bollards, full pedestrian and bike connectivity (including a regional trail connection), and different forms of central island landscaping to enhance visibility. Each of the three roundabouts has a unique history: the first WSDOT roundabout built, the last WSDOT roundabout built, and a local agency roundabout on a high volume arterial that included the removal of a traffic signal.

10:15 AM – 11:45 AM

Breakout Sessions

6A) International Perspectives – Roundabout Intersections

Moderator: Andrew Paul, Massachusetts DOT

Presenters

· Werner Brilon, Ruhr-University Bochum, Germany, Roundabouts: A State of the Art in Germany

Brilon Paper

· Keith Boddy, Nova Scotia Transportation & Infrastructure Renewal, Canada, Canadian Roundabouts - Practice Review

· Hideki Nakamura, Nagoya University, Japan, The State of the Art of Roundabout Implementation in Japan

· Howard McCulloch, NE Roundabouts, Status of Roundabouts in New York State

6B) Micro-Simulation Studies on Existing Roundabouts – Calibration and Modeling 3D

Moderator: Will Britnell, Connecticut DOT

Presenters

· Sewa Ram, School of Planning and Architecture, New Delhi, India, Performance Indices for Roundabouts in Heterogeneous Traffic Conditions

· Sean Riley & Matt Hamel, DLZ Corporation, Roundabout 3D Modeling

· Amphone Soupharath, Vanasse Hangen Brustlin, Inc., Integrating RSAs and 3-D Visualization Tools to Enhance Roundabout Design Process

6C) Accelerating Roundabout Implementation in the United States – FHWA TOPR 34

Moderator: Jeff Shaw, Federal Highway Administration

Presenters

· Lee A. Rodegerdts, Kittelson & Associates, Inc., Reassessment of Roundabout Capacity Models for the Highway Capacity Manual

· Katy Salamati & Nagui Rouphail, ITRE at N.C. State University, Assessment of the Environmental Characteristics of Roundabouts

· Bastian Schroeder, ITRE at N.C. State University, Evaluation of Rectangular-Rapid-Flashing Beacons (RRFBs) at Multilane Roundabouts

· Hermanus J. Steyn, Kittelson & Associates, Inc., Safety - Fatal and Injury Crash Evaluation in the US

1:00 PM – 2:45 PM

Breakout Sessions

7A) Turbo Roundabouts and Unconventional Geometry Roundabouts

Moderator: Gene Russell, Kansas State University

Presenters

· Bill Baranowski, RoundaboutsUSA, Turbo Roundabout Design? - Redesign of Park City's 14 Year Old Deer Valley Roundabout

· Tim Murphy, Delcan Corporation, The Turbo Roundabout, A First in Canada

· Steven Chan, Transoft Solutions Inc., Design Vehicle's Influence to the Geometric Design of Turbo Roundabouts

Chan Paper

· Tomaz Tollazzi, University of Maribor, Slovenia, Alternative Types of Roundabouts

7B) Organizational Structure for Delivering Innovative Roundabouts

Moderator: Chris Tiesler, Kittelson & Associates, Inc.

Presenters

· Dina Swires, Washington State DOT, A Region Traffic Engineer Perspective: Developing and Delivering Roundabout Intersections

· Chris Damitio, Washington State DOT, Project Development, Public Input & Delivery from a Design and Construction Project Engineer Perspective

· Kurt Stiles, Washington State DOT, Visual Communications (Design Visualization) During Project Development Stage

· Brian Walsh, Washington State DOT, The Road to Sustain Success and Project Concurrence

7C) Various Models/Tools that Support Roundabout Choice in Design, Environmental, and Network Arenas

Moderator: Ahmed Aburahmah, City of San Diego, California

Presenters

· Antonio Pratelli, University of Pisa, Italy, and Gene Russell, Kansas State University, Unconventional Roundabout Geometry for Large Vehicles or Space Constraints

Pratelli Paper

· Rahmi Akcelik, SIDRA SOLUTIONS, Recalibration of a Vehicle Power Model for Fuel and Emission Estimation and its Effect on Assessment of Alternative Intersection Treatments

Akcelik Paper

· Kazunori Munehiro, CERI, Japan, Driving Behavior and Travel Path of Semi-Trailer on Roundabout

· Sepideh Eshragh, Iowa State University, Network Performance Improvement During Hurricane Evacuation Using Roundabouts

3:15 PM – 4:45 PM

Breakout Sessions

8A) Mini-Roundabouts

Moderator: Colin Ridding, Mott MacDonald

Presenters

· Michael A. Gingrich Sr., Alternative Intersection Control, Origins, Applications, and Examples of Double Mini Roundabouts

· Wei Zhang, Federal Highway Administration, Mini-roundabout Case Studies

Zhang Paper

· Scott Ritchie, Roundabouts & Traffic Engineering, FHWA Mini Roundabout Study

· Marko Rencelj, University of Maribor, Slovenia, Slovenian Experiences with Mini Roundabouts and Assembled Roundabouts

Rencelj Paper

8B) Unique Roundabout Applications – Case Studies PART 2

Moderator: Kirk Spaulding, Sanderson Stewart

Presenters

· Joseph C. Balskus, Tighe & Bond, and Will Britnell, Connecticut DOT, Modern Roundabouts in CT - An Engineering Journey

· Tatsuo Takase, Shinshu University, Japan, Report on Pilot Project of Roundabout in Karuizawa Roppontsuji

· Kenneth Voigt, Ayres Associates, Challenges of Constructing Cheyenne's First Dual Lane Five-Leg RoundaboutVoigt Paper

8C) Design Checks and Validation

Moderator: Tom Blust, Oakland County Road Commission, Michigan

Presenters

· Patrick McGrady, Reid Middleton, Roundabout Relationships: Validating Your Design

· Michael J. Wallwork, Alternate Street Design, PA, Improving Roundabout Designs

Wallwork Paper

· Mark Lenters, GHD Inc., Geometric Design Heuristics for Modern Roundabouts (not published)

Friday, April 18

8:00 AM – 9:30 AM

Breakout Sessions

9A) Citizen Activism, Engineering Outreach, and Elected Official Perspectives

Moderator: Craig Parks, America Structurepoint

Presenters

· Jeannette Taylor, Jacobs Engineering, Built It and They Will Come - Woodinville Tourist District Roundabouts

· Rod Warner, US41Momentum, Getting to "Want-It-NOW!" from "No-Way"

· Joseph T. "Jody" Short, Lee Engineering, An Elected Official's Experience with Roundabouts

· Robert Dell-Ross, City of Roswell, Georgia, Lessons Learned from Roswell's First Modern Roundabout

Making of a Roundabout (no audio)

9B) Evolution of Roundabout Practice in the United States – A Conversational Panel with Audience Participation

Moderator: Brian Walsh, Washington State DOT

Presenters YOUTUBE VIDEO

· Edward Myers, Kittelson & Associates, Inc.

· Ken Sides, City of Clearwater, Florida

· Howard McCulloch, NE Roundabouts

· Jeff Shaw, Federal Highway Administration

9C) Design Concepts: Sidepaths, Adding More Legs to Roundabout, Flared Entries, and Pedestrian Design Checks

Moderator: Dan Dovey, King County, Washington

Presenters

· Patrick Fleming, Wisconsin DOT, Shared Use Paths & Roundabout Sidepaths

· Mark T. Johnson, MTJ Engineering, LLC, Effective Lane Utilization with Flared Entry Design

· Troy Pankratz, GHD Inc., Design Considerations for 5 and 6 Leg Roundabouts

9:45 AM – 11:00 AM

Breakout Sessions

10A) Complexities of Multi-Lane Roundabouts and Safety

Moderator: Nathan Belz, University of Alaska – Fairbanks

Presenters

· Andrew Plowman, WSB & Associates, Inc., Safety Performances of Multi-Lane Roundabouts

· Hillary Isebrands, Federal Highway Administration, The Multi-lane Roundabout PDO Dilemma

· Mark T. Johnson, MTJ Engineering, LLC, Optimizing Roundabout Safety and Operations

· Sam Bobko, Hatch Mott MacDonald, The Roundabout Was Supposed to Reduce Crashes. What Happened?

10B) Unique Roundabout Applications – Case Studies PART 3

Moderator: Lee Stuart, American Traffic Safety Services Association

Presenters

· Phil Weber, GHD Inc., Freeway Termination Roundabouts

· Pete Jenior, Kittelson & Associates, Inc., Walnut Lane Traffic Circle Retrofit

Jenior Paper

· Anne Sherwood, Halifax Regional Municipality, Canada, North Park Street Roundabouts: A Halifax Urban Challenge

10C) Speed Management for Roundabouts

Moderator: Andy Duerr, GHD, Inc.

Presenters

· John Denholm III, Lee Engineering, LLC, A Review of Speeds at Roundabouts in North Texas

Denholm Paper

· Victor L. Salemann, Transportation Solutions Inc., Case Study of a Rural Roundabout

· Stephan Kellner, WSP Canada Inc., High-Speed Roundabouts: Case Studies in Quebec

11:00 AM – 12:15 PM

Closing Plenary Session

11) Town Hall Roundabout Forum YOUTUBE VIDEO

YOUTUBE: TRB Town Hall Forum Part 1

YOUTUBE: TRB Town Hall Forum Part 2