February 10, 2015 FHWA Resource Center 1 Modern Roundabouts: Changing our Intersection Landscape South Tahoe, CA • February 10, 2015 Hillary N. Isebrands, PE, PhD USDOT ‐ FHWA Resource Center Safety & Design Technical Service Team Lakewood, CO Vail , CO Kings Beach, CA Incline Village, NV Source of Images: Isebrands, Google Earth, Isebrands Topics for Discussion » Intersection Safety Facts » Roundabouts Facts & Characteristics » Designing for All Users & Roadway Character » Roundabout Examples » Summary » Questions/Discussion Photo Source: Isebrands
20
Embed
February 10, 2015tahoempo.org/presentations/tahoetalks/Tahoe Talks Feb 2015 hando… · Source of Images: Seattle DOT and Asheville, NC Asheville, NC Physical Features of a Modern
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
February 10, 2015
FHWA Resource Center 1
Modern Roundabouts: Changing our Intersection LandscapeSouth Tahoe, CA • February 10, 2015
Hillary N. Isebrands, PE, PhDUSDOT ‐ FHWA Resource CenterSafety & Design Technical Service TeamLakewood, CO
Vail , CO Kings Beach, CA
Incline Village, NV
Source of Images: Isebrands, Google Earth, Isebrands
Topics for Discussion
» Intersection Safety Facts
» Roundabouts Facts & Characteristics
» Designing for All Users & Roadway Character
» Roundabout Examples
» Summary
» Questions/Discussion
Photo Source: Isebrands
February 10, 2015
FHWA Resource Center 2
Intersection Safety Facts
Source Isebrands, FHWA
» About half of all severe crashes occur at intersections
» 25% of all fatalities are at intersections» Angle crashes account for over 40% of fatal crashes at intersections
» Left turn crashes account for over 20% of fatal crashes at intersections
» Ped/Bike crashes account for 25% of fatal crashes at signalized intersections
FHWA Focused Approach to Safety
February 10, 2015
FHWA Resource Center 3
5
» Increase awareness of intersections» Increase visibility of intersections and traffic control devices
» Improve the design of intersections to reduce conflicts
» Improve driver navigation to reduce confusion
» Improve the operations of intersections» Improve sight distance at intersections» Improve driver compliance with traffic control devices
Key Areas for Improving Intersection Safety
Source of Images: Google Earth
Middleton, ID
February 10, 2015
FHWA Resource Center 4
Roundabout Facts & Characteristics
Source of Images: Google Earth
Roundabout Safety Experience
» Fatal and injury crashes reduced significantly
» The number of conflict points is ¼ of traditional intersection