Presentations

2023

TRB  Annual Meeting:
Effects of Phi and View Angle Geometric Principles on Multi-lane Roundabouts

 

2022

TRB International Conference on Roundabouts:
Roundabout Design Optimization for Safety

Flared Entries and Geometric Model Comparison

Performance Planning with Roundabouts

Pedestrians & Vulnerable User Safety at Roundabouts

Signing & Marking Principles to Optimize Safety at Roundabouts”

ITE-Great Lakes District Annual  Meeting:
Key Geometric Design Principles for Optimal Roundabout Safety

 

2021

PE Magazine by National Society of Professional Engineers (NSPE), Spring 2021:
Avoid Roundabout Controversy with Effective Public Outreach” – Article, PDF

Civil Engineering Magazine, March/April 2021:
Modern Roundabouts Boost Traffic Safety and Efficiency” – Article (Interview), PDF

ITE Journal, March 2021:
Rural Roundabouts Save Lives” – Article

 

2020

ITE Annual Meeting & Exhibition:
Safety Design Principles for Pedestrian/Vulnerable Users at Roundabouts” – 17×11 Printable Poster

Pedestrians – Accessibility – Safety: Roundabout Design for Non-Motorized Users – Power Brief – PDF

 

2019

Transportation Research Board (TRB) Annual Meeting, Washington, DC, January 2019:
Safety Impacts of Signing and Pavement Markings on Property-Damage-Only Crashes at Multi-Lane Roundabouts – Paper

Published by TRB Transportation Research Record 2019

Ohio Transportation Engineering Conference (OTEC), Columbus, OH, October 2019:
Roundabout Design Optimization for Safety – Recorded Presentation

 

2018

IRF Global Road2Tunnel Conference in Las Vegas, NV, November 2018:
Roundabout Design: Multi-Modal Safety, Innovation & Transformation – Recorded Presentation

Ohio Transportation Engineering Conference (OTEC), Columbus, OH, October 2018:
Signing and Marking at Multi-Lane Roundabouts – Recorded Presentation

Transportation Research Board (TRB) Annual Meeting, Washington, DC, January 2018:
The Impact of Geometric Factors on the Capacity of Single-Lane Roundabouts – Paper

Published by TRB Transportation Research Record 2018
Winner: 2018 TRB Roundabouts Committee Best Paper Award

Innovative Roundabout Pedestrian/Bike Treatments for Complete Streets – Poster
The Impact of Geometric Factors on the Capacity of Single-Lane Roundabouts – Recorded Presentation

 

2017

Transportation Research Board (TRB) 5th International Roundabout Conference, Green Bay, WI, May 2017 :

“Application of Safety Design Principles for Urban Multi-lane Roundabouts – Keys to Improving Driver Comprehension and Reducing PDO Crashes” – Paper

Application of Safety Design Principles for Urban Multi-lane Roundabouts” – 11×17 Printable Poster

Pedestrian/Vulnerable User Safety and Design Implementation” – 4×6 Poster

Solving Complex Traffic Issues with Unique Roundabout Applications” – 4×6 Poster

Traffic Planning Implications of the Operational Characteristics of Roundabouts– 4×6 Poster

A Critical Review of TOPR34 (HCM 2016 Update)” – 4×6 Poster

 

2016

ITE Midwestern / Great Lakes District Joint Conference:
Public Outreach and Roundabout Implementation Overcoming Challenges” – 11×17 Printable Poster

 

Transportation Research Board (TRB) Annual Meeting, Washington, DC, January 2016 and
Ohio Transportation Engineering Conference (OTEC), Columbus, OH, October 2016

Design Optimization for Safety and Operations of Multi-Lane Roundabouts” – Paper
Design Optimization for Safety and Operations of Multi-Lane Roundabouts” – 11×17 Printable Poster

 

2015

International Symposium on Highway Geometric Design, Vancouver, British Columbia, June 2015:

A Case for Geometrically-Based Roundabout Capacity Equation Modeling” – Paper

A Case for Geometrically-Based Roundabout Capacity Equation Modeling” – 11×17 Printable Poster

Transportation Research Board (TRB) Annual Meeting, Washington, DC, January 2015:
Synthesis of Roundabout Design and Operations with Flared Entries” – Paper

TRB Practice-Ready Paper

Synthesis of Roundabout Design and Operations with Multi Lane Flared Entries” – 11×17 Printable Poster

 

2014

Transportation Research Board (TRB) Roundabout Conference, Seattle, WA, April 2014:
Implications of Modern Roundabouts for Our Communities and Existing Roadway Planning Standards” – Recorded Presentation
Effective Lane Utilization with Flared Entry Design” – Recorded Presentation
Optimizing Roundabout Safety and Operations” – Recorded Presentation

 

2013

Transportation Research Board (TRB) Annual Meeting, Washington, DC, January 2013:
Synthesis of Roundabout Geometric Capacity Measurement; Calibration and Validation to US Field Measurements” – 4×8 Poster

 

2011

Transportation Research Board (TRB) Roundabout Conference, Carmel, IN, May 2011:
Transportation Planning Implications of Roundabout Application” – Recorded Presentation
Transportation Planning Paradigm Change with Roundabout Applications” – Recorded Presentation
Complex High Capacity Roundabouts” – Recorded Presentation
Lessons Learned from 40 Years of Design, Research, and Practice by Barry Crown” – Recorded Presentation (by Mark Johnson)

Transportation Planning Exchange (Transplex) Conference, virtual conference, October 2011:
Access Management Considerations for High Capacity Multi-Lane Roundabout Design and Implementation” – Poster

 

2008

Transportation Research Board (TRB) Annual Meeting, Washington, DC, January 2008:
High Capacity Roundabout Applications in Constrained Roadway Systems” – Recorded Presentation