FHWA roundabout presentation

Roundabouts – An FHWA Perspective Mark Doctor, PE FHWA Resource Center

Progress in building roundabouts MD DE DC MA OR RI NJ NH ME PA WV NC SC GA FL OH MI IN IL WI IA MO LA NM CO SD ID CA WA TN VT MS MT ND NV AZ UT WY NE KS OK TX AR MN AL KY VA NY CT AK HI Disclaimer: This is a subjective assessment based on information available on certain factors and conditions. If you have data to suggest revising this assessment, please contact Mark Doctor at FHWA (mark.doctor@dot.gov) moderate little or no activity substantial

So, why aren’t more agencies building roundabouts?

[object Object],From the Home Office in Lumpkin, GA -

Myth #10 - Roundabouts and traffic circles are the same thing ≠

FACT: Roundabouts are a subset of circular intersections Roundabouts Rotaries Neighborhood traffic circles All circular intersections Others

Myth #9 - Roundabouts cause more crashes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What makes roundabouts safer? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Myth #8 - The public will never accept roundabouts Photo source: NYSDOT

FACT: Public Attitude Toward Roundabouts Quickly Changes After Construction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],NCHRP Synthesis 264

Drivers Who Favor or Oppose Roundabouts FAVOR STRONGLY OPPOSE Insurance Institute for Highway Safety 31 63 41 15

From Opposition To Support ITE Journal Sept 2002: Surveys in Kansas, Maryland and Nevada

Myth #7 - Roundabouts cost more ,[object Object],[object Object],[object Object],[object Object]

R.O.W. Comparison Main St. and Center St. Hamburg, NY Source: NYSDOT

[object Object],[object Object],Myth #6 – Roundabouts have less capacity than signalized intersections

[object Object],Myth #5 – Fire trucks and other large vehicles can’t make it through a roundabout

Myth #4 - Roundabouts are not good for pedestrians and bicyclists ,[object Object],[object Object],[object Object]

Comparison of Vehicle / Pedestrian Conflicts 16 Conflicts 8 Conflicts

Myth #3 – Roundabouts aren’t good for older drivers ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],“ There is agreement that elderly road users require mobility, and that they should be accommodated by the highway’s design and operational characteristics to the greatest extent practicable. Thus, designers and engineers should be aware of the problems and requirements of the elderly, and consider applying applicable measures to aid their performance.” — AASHTO Green Book

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The Acacia Roundabout Clearwater, FL … opened in December, 2001

[object Object],[object Object],Myth #2 – Roundabouts are bad for the nearby businesses

Case Study: Golden, Colorado South Golden Road

Case Study: Golden, CO South Golden Road – 15,000 ADT ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Myth #1 – The roundabout center island is a great place to put a park, a monument, or a fountain

Roundabout Landscaping “ Musica” at the Music Row Roundabout – Nashville, TN

Roundabout Landscaping Bloomington, IN

Principles for Good Roundabout Landscaping ,[object Object],[object Object],[object Object],[object Object],[object Object]

For more information …. Contact: Mark Doctor FHWA Resource Center (404) 562-3732 [email_address]

FHWA roundabout presentation

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FHWA roundabout presentation