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” – 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