Notes

Slide Show

Outline

1	Roundabout Overview
2	What Is A Roundabout?
3	Key Characteristics of Modern Roundabout Entering traffic yields to circulating traffic Entering traffic aims at center of central island and is deflected around it Upstream roadway often flares at entry, adding lanes
4	Non-conforming Traffic Circles Very large High speed entries High speed circulating traffic Weaving in circle High speed crashes Very uncomfortable to drive Low capacity Everyone hates them
5	State Route 28, Kingston, NY
6	State Route 28 - Kingston, NY after reconstruction
7	Benefits of Roundabouts
8	Safety
9	US Intersection Crash Statistics
10	Designing for Safety
11	Safety Comparison Signals vs. Roundabouts
12	Insurance Institute for Highway Safety
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14	Why are Roundabouts Safer for Pedestrians? Lower Crash Speeds Shorter Braking Distance Less Severe Accidents
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16	Pedestrians: Probability of Death if Struck by a Vehicle
17	US Roundabouts at Schools
18	Intersection Capacity Traffic yields vs. Stops No lost time Size depends on entering flow and circulating flow
19	Aesthetics / Environmental Additional Green Space Community Identity Streetscape Less Air Pollution from Traffic
20	Aesthetics / Environmental
21	Rules of the Road YIELD Choose Your Lane BEFORE entering Roundabout Slow Down DO NOT pass or drive adjacent to large trucks Emergency Vehicle – PULL OVER Pedestrians Bikes
22	Potential Locations High Crash Rate Capacity concerns Part of larger reconstruction project Potential future development Unconventional geometry 4-way stop and signal locations
23	Summary of Benefits
24	CTH G & Paradise Drive Single Lane Rural
25	USH 10 & WIS 55
26	STH 54/Gaynor/17 St Wisconsin Rapids
27	6^th Street Viaduct Milwaukee