NEW YORK STATE DEPARTMENT OF TRANSPORTATION. General Roundabout Overview. What is a Roundabout? It is a type of intersection control, just as signals and stop signs are examples of intersection control. Example of Signal Controlled Intersection.
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What is a Roundabout?It is a type of intersection control, just as signals and stopsigns are examples of intersection control.
1. Entering traffic must yield to circulating;
2. Entering vehicles are deflected by splitter islands,
creating a low / similar speed environment;
3. Circulating vehicles must travel around a
non-mountable center island.
Colorado > 240
Washington > 150
Utah > 110
Maryland > 100
North Carolina > 90
Oregon > 75
Florida > 50
Kansas & Missouri > 45 each
California & Nevada > 30 each
New York at least 54, with > 90 in design throughout the state
North Haven (01) single laner that was to be 1 of 2
Rochester (03) single laner on RIT campus
Great Neck (03) single laner that replaced signalized circle
Voorheesville (03) single laner that replaced yield “Y”
Greenwich (04) single laner that replaced signalized “T”
Ithaca (04) single laner off state system
Plattsburgh (04) single laner that replaced signalized 4-way
Liberty (2) (06) single laners off Exit 100, I-86
Cortlandt Manor(06) single laner that replaced signal
Huntington (02) single laner used for traffic calming
Rochester (05) single laner with raised pedestrian crossing
Mt Vernon (06) single laner with fountain and music
Mendon (06) single laner with center light; hi-speed
Stony Brook, LI(06) single laner on campus roadway
Poughkeepsie (3)(06/08) single laners near Vassar College
Bethlehem (07) single laner that replaced a 3-way stop
Bainbridge (07) single laner just off I-88 exit w/NY 206
Hamburg (4) (07/08) urban single laners made of 100% PCC
Westchester Airport (06) access to local airport
Westhampton Beach (06) oval single laner at former 6 corners
Eastern LI (07) local intersection designed by McLean
Colonie Center (07) access to mall from town road
Glens Falls (07) 5 legs in urban, downtown environment
Malta (08) single laner for Round Lake Bypass
Cohoes (08) single laner at 3 corners
Niagara Falls (07) single laner on Rainbow Boulevard
Malta (2) (08) single laners on Dunning St. for Tech Parks
Buffalo (2) (08) single laners that are only 100’ apart
Caledonia (05) resigned & restriped traffic circle
Kinderhook (05) 2 laner for SB direction only, 5 legs
Buffalo (08) Harlem/Cleveland Road
Corning (2) (03) access permits for R & D plant
Latham (02) resigned & restriped traffic circle
Griffiss (02) major-minor done in old air force base
Kingston (00) 2 laner that replaced traffic circle
Malta (5) (06) 5 total in a ¾ mile corridor
Johnson City (05) 2 laner & flyover that replaced traffic circle
Slingerlands (4) (07) 4 total in a 1.5 mile section of new hwy
Round Lake major-minor @ Rt 9/67
Rotterdam single laner @ 7/146
Batavia single laner @ 33/98
Irondequoit (4) single laners at end of 590
Buffalo major-minor on Outer Harbor project
Aurora resigned and restriped single lane circle
Latham Old Wolf @ Old Nisky
Malta (2) a single & major-minor for AMD
Monticello single laner @ 104 off 17B
Mayfield major-minor @ 29 & 30
East Greenbush Route 4 @ 151
Auburn railroad right thru center island
Brockport single laner with ROW constraints
Cicero Onondaga County project
Glenville Maple @ Glenridge Road
Unless “All Red” Signals Provide No “Protected” Pedestrian Phase
Adding a Signal Doesn’t Always = SafetyThe Leader Herald – April 22nd, 2005
Photo: Matthew Enders, WSDOT
Common Objections – Large Trucks 75’x13’ Modular Home Takes Left at Greenwich, NY Roundabout
Sherrill Phillips, Supervisor of Transportation for the Ichabod
Crane School District (28 buses) "Very pleased with the roundabout –
there are no problems reported from any of their bus drivers."
"Red light running was common before with the signal,
especially from Rt 9 South."
"Students crossing from the school (south of roundabout)
have a safer crossing due to the traffic calming effect."
The director of the Charles R. Wood Theater
said she was skeptical when the
Greenwich roundabout was first talked about.
"I\'m not an expert on traffic, but I was convinced it wasn\'t going to work out," she said.
Now, she describes driving through the circular intersection as an "awesome“ experience.
"I guess sometimes you just have to trust the opinions of traffic experts," she said.
Glen & Bay Streets, Glens Falls - 5 leg urban
The Batavia roundabout in 20 years