
	Where results make sense

Topic: Roundabout intersection

Related Topics

Roundabout

Traffic circle

Magic Roundabout (Swindon)

Slip road

Road

T junction

Diamond interchange

Stop sign

Railroad crossing

Highway 407

Cloverleaf interchange

Parclo Interchange

Road transport

Road train

Hanger Lane tube station

	Roundabout - Wikipedia, the free encyclopedia
		Roundabouts are statistically safer than both traffic circles and traditional intersections, though they do not cope as well with the traffic on motorways or similar fast roads.
		Roundabouts are safer than both traffic circles and traditional intersections—having 40% fewer vehicle collisions, 80% fewer injuries and 90% fewer serious injuries and deaths (according to a study of a sampling of roundabouts in the United States, compared with the intersections they replaced).
		The roundabout is situated on the N25 southern ring road dual carriageway, at the intersection with a dual-carriageway to the city centre, a road to Bishopstown, and the airport or Kinsale road.
	en.wikipedia.org /wiki/Roundabout_intersection (1841 words)

	Tooele County Roundabout Design Guidelines
		Roundabout Design Guidelines 1995 by Ourston and Doctors, was created for the State of California DOT and follows the British model for roundabout design.
		The approach curve to the roundabout shall be the same radius or smaller than the radius of the curved path that a vehicle would be expected to travel through the roundabout.
		On arterial roundabouts, the splitter islands shall be at least 6 feet wide to shelter a pedestrian and be a reasonable target to be seen by approaching traffic.
	www.co.tooele.ut.us /roadmanu.htm (2423 words)

	MDSHA: Traveling Maryland's Roundabouts: History of Roundabouts
		In addition, smaller circular intersections were proposed that required adequate horizontal curvature of vehicle paths to achieve slower entry and circulating speeds.
		This roundabout, at the intersection of MD 94 and MD 144 in Lisbon, Howard County, was built primarily to reduce accidents.
		Prior to conversion to a roundabout, the intersection was listed as a high accident intersection, with an average of eight police reported accidents per year.
	www.sha.state.md.us /safety/oots/roundabouts/history.asp (473 words)

	Roundabout Designs That Work
		Roundabouts are especially useful to slow traffic and move it smoothly through city intersections.
		In Pittsburgh, a roundabout project is underway at the intersection of Route 9 and York Road.
		Ourston, whose Roundabout Design Guidelines is available at www.amazon.com, says that when roundabouts don’t work well, it is never the fault of the driver, the city, or the country.
	www.betterroads.com /articles/jul04b.htm (1171 words)

	City of Yakima
		Roundabouts are becoming more common in the State of Washington where 48 have been constructed since 1997.
		A roundabout has less vehicle delay than a traffic signal.
		The Roundabout is designed for vehicles to travel at 15 Miles Per Hour while in the intersection.
	www.ci.yakima.wa.us /services/streets/roundabout.asp (349 words)

	[No title]
		That means a motorist or bicyclist approaching a roundabout must slow down or stop for vehicles stopped ahead, yield to pedestrians in the crosswalk, and yield to traffic already in the roundabout.
		He emphasizes that it is important to understand the distinction between a roundabout and a traffic circle in order to navigate it successfully.
		The design of a roundabout, with smaller central islands and median island deflectors, slows traffic upon entry and while circulating, whereas the design of a traffic circle allows for higher speed entry and circulation.
	town.huntington.ny.us /newsdetails.cfm?id=308 (642 words)

	RoundaboutsUSA
		Roundabouts are used extensively throughout Europe, and in many other places around the world, to reduce accidents, traffic delays, fuel consumption, air pollution and construction costs, while increasing capacity and enhancing intersection beauty.
		A roundabout is a circular intersection similar to the traffic circle previously used in this country.
		This safety advantage has been attributed to the slower traffic speed at roundabouts and the division of the pedestrian crossing into two stages, from the near-side wheelchair ramp out to the splitter island, and then from the splitter island to the far-side wheelchair ramp.
	www.roundaboutsusa.com /intro.html (617 words)

	TRAFSafe Validations/Case Studies (Site not responding. Last check: 2007-11-07)
		An intersection study completed to define whether a developers proposed intersection was “safe” and if not what alternatives are available to resolve the safety problem.
		Unfortunately the intersection was constructed to the developer's desire with Lodon County electing not to concentrate on temporary enforcement as a solution rather than geometric design.
		An intersection study completed in spring of 2003 where citizens wanted a demonstration that a County road construction project would be safer after construction than it was in the existing condition.....including the effect to pedestrians and bikers since the road would be widened and thus more difficult to cross.
	www.trafficsafetysoftware.com /ts_validation.htm (382 words)

	Honolulu Star-Bulletin Hawaii News
		A second roundabout is under construction in Salt Lake at Likini, Ala Lilikoi and Ala Ilima streets.
		A roundabout might be good at other places, she said.
		The roundabout was designed to make the roadway narrow enough to slow traffic, as drivers angle and turn to get around it.
	starbulletin.com /2000/02/14/news/story10.html (909 words)

	Roundabout Safety Comes to America pg 1, Autumn 1995, Public Roads
		The physical configuration of a modern roundabout, with a deflected entry and yield-at-entry, forces a driver to reduce speed during the approach, entry, and movement within the roundabout.
		This is contrary to an intersection where many drivers are encouraged by a green or yellow light to accelerate to get across the intersection quickly and to "beat the red light" and contrary to old traffic circles where tangent approaches also encourage, or at least allow, high-speed entries.
		In France, where roundabouts were installed mostly in urban areas and their suburbs including residential areas, the safety of roundabouts was generally superior to signalized intersections except where the roundabouts were large with wide entries or where there was extensive bicycle traffic.
	www.tfhrc.gov /pubrds/fall95/p95a41.htm (2885 words)

	MBTC 1099, Final Report
		The roundabout is controlled by ‘yield to circulating traffic’ rule and has deflection creating a low speed curve around the central island, thereby fitting the definition of a roundabout of modern design.
		This intersection is one of the City high accident locations where the plan is to replace the existing traffic signal with a roundabout at an estimated cost of $250,000.
		A comparable intersection was determined to be one that had the same general physical layout, and operated under similar traffic loadings as the roundabout.
	www.mackblackwell.org /research/finals/arc1099/framereport1099.html (11155 words)

	Hurst-Rosche --- Services - Transportation Planning and Engineering - Highways - Roundabouts (Site not responding. Last check: 2007-11-07)
		A roundabout was chosen over a signalized intersection because of its greater ability to reduce the types of accidents primarily occurring at this intersection (right angle and left turn).
		This was the first modern roundabout constructed on Maryland State highways.
		The project involved intensive public involvement including numerous meetings with a citizens committee to monitor the effectiveness of a temporary roundabout and the installation of a permanent roundabout.
	www.hurst-rosche.com /Services/Transportation/Highways/Roundabouts.htm (300 words)

	district 6 page (Site not responding. Last check: 2007-11-07)
		A roundabout is basically a large circle in the middle of an intersection.
		Vehicles move in a counter-clockwise direction through the intersection and all entering traffic yields to the traffic already in the circle.
		Roundabouts also handle a greater volume of traffic than a conventional signalized intersection.
	www.modot.state.mo.us /local/d6/hottopics/MiscTopics/roundabout.html (165 words)

	Welcome to Arizona Roundabouts!
		A roundabout is a one–way circular intersection without traffic signal equipment in which traffic flows around a center island.
		Additionally, modern roundabouts often solve traffic congestion problems without requiring road segments to be widened between intersections (known as the "wide nodes, narrow roads" philosophy) resulting in a net cost savings.
		Aggressive drivers are less of a safety threat when intersections are controlled by modern roundabouts than traffic signals and stop signs because (1) the potential for head-on and broadside crashes is almost completely eliminated with roundabouts and (2) speeds are lower.
	www.dot.state.az.us /CCPartnerships/Roundabouts/faq.asp (1667 words)

	Kinderhook Neighbors for Good Growth
		In general, a multi-lane roundabout is less safe than a single lane roundabout, and the nature of the proposed five-lwg intersection would further confuse drivers.
		If the roundabout requires a two-lane approach for Route 9 northbound, the roundabout would need to be shifted further to the west to avoid the need to acquire property.
		The users of the roundabout come from a geographically diverse area and a significant effort would be required to advise and inform the peep.
	kngg.org /cdmreview.shtml (906 words)

	The Smoky Mountain News (Site not responding. Last check: 2007-11-07)
		The roundabout will have four roads coming into it like an intersection, but instead of coming to a complete stop, motorists slow down, pull into the roundabout and then turn out of the roundabout on the other side.
		° Four-lanes with a grass and wildflower median from the roundabout to the intersection of Francis Farm Road.
		The road will be six lanes at the intersection with Junaluska Elementary, allowing two lanes for through traffic, a lane for left turns and a lane for right turns.
	smokymountainnews.com /issues/12_03/12_17_03/fr_highway_design_mix.html (417 words)

	Downloads (Site not responding. Last check: 2007-11-07)
		Roundabout metering signals are often installed on selected roundabout approaches and used on a part-time basis since they are required only when heavy demand conditions occur during peak periods.
		Case studies of various roundabouts where metering signals were used, or considered for use, have been presented in previous papers by the author.
		Case studies are presented to show that roundabout capacity and level of service depend not only on the circulating flow rate but also the characteristics of approach flows contributing to the circulating flow.
	www.aatraffic.com /downloads.htm (4221 words)

	kingcountyjournal.com - First high-speed roundabout in region to open near Duvall (Site not responding. Last check: 2007-11-07)
		The $3.7 million roundabout is at the intersection of State Route 203 and Northeast 124th Street just south of Duvall.
		The roundabout project is intended to reduce the severity of accidents, collisions and delays, and push more cars through the intersection, Coon said.
		Some roundabout intersection signs went up Thursday, showing the circular configuration of the roundabout, which used to just be a stop sign for traffic from the west.
	www.kingcountyjournal.com /sited/story/html/174221 (507 words)

	JS Online: Reconstruction on Grange Ave. finished
		One of the problems with the intersection at Grange and 116th was a disproportionate volume of traffic on Grange, where the flow is heavier, said Department of Public Works Director Mike Martin.
		Concerns over slowing traffic at the intersection led to an analysis of traffic accidents, followed by public meetings and consideration of alternatives such as traffic signals or a four-way stop with signs.
		According to a brochure from the Federal Highway Administration, the benefits of a roundabout include: up to a 90% reduction in fatalities; a 76% reduction in injuries from crashes; and a 30% to 40% reduction in injuries to pedestrians in crashes.
	www.jsonline.com /news/metro/jul04/241067.asp?format=print (481 words)

	Kinderhook Neighbors for Good Growth
		Urban roundabouts are generally thought of by state DOTs and the Insurance Institute for Highway Safety, as not appropriate for urban areas because of their high volume of auto and pedestrian traffic.
		Roundabout designers, a number of whom are British or Australian, grudgingly acknowledge that they have a lot to teach Americans about going in circles.
		As I understand the purpose of a roundabout, it is used in rural areas to keep the flow of traffic moving.
	kngg.org /medialetters.shtml (9870 words)

	TFGAP Roundabout Signals. (Site not responding. Last check: 2007-11-07)
		Because the roundabout differs greatly from the plain crossing, we suggest that a signal placed at the edge of the loop for entering traffic use neither the traditional arrow or dot, but rather a new symbol exclusive to roundabouts.
		Another reason to show only one leg of the roundabout is to emphasize that this signal governs the juncture of the circulating road with only the immediate leg: other approches will have their own controls.
		One instance occurs when traffic signals at the intersection have been removed and replaced with ordinary yield signs; another instance is when in a series of roundabouts along a highway, nearly all have signals and drivers must be alerted to the exceptions.
	home.earthlink.net /~tamivox/dave/traffic/round (2258 words)

	The Sag Harbor Express
		The North Haven traffic calming project and roundabout are successful in improving ten out of 12 criteria, according to a final evaluation report released this week by the New York State Department of Transportation.
		When comparing the study phases, Eschbacher found that it took the same amount of time for motorists to pass through the roundabout as it did when there was a busy semi-regulated intersection.
		He and Congressman Tim Bishop, are seeking funding for the Town of Southampton proposal to expand the Route 114 Project from the roundabout at Short Beach and Tynadall Roads in North Haven, through Short Beach Road to the roundabout at Noyac and Long Beach roads in Noyac.
	www.sagharboronline.com /20040212/news4.htm (742 words)

	Engineering
		Roundabouts require about the same amount of land as an improved, signalized intersection, but the installation cost is about $100,000 less by deleting signal equipment.
		Pollution is reduced and the environment is improved due to the fact that less vehicle idling occurs at roundabout intersections, creating an economy of fuel use and a reduction in emissions versus signalized intersections.
		Roundabouts have been documented to have between 30% and 50% increase in capacity of a typical four-way signalized intersection.
	www.ci.huntsville.al.us /508/engineering_index.html (3992 words)

	Washington County, OR -- Sherwood’s NE Oregon Street to reopen to traffic November 13th
		Replacing a standard "T" intersection, the roundabout accommodates traffic flow counterclockwise around a central island.
		A roundabout emerged as a clear design winner for this intersection because it will improve traffic flow, have less potential for accidents (due to lower number of conflict points), improve air quality (less traffic idling), reduce speeds entering Sherwood, and have lower maintenance costs.
		As motorists approach the roundabout, advance-warning signs inform of the road configuration and reduced speed limit ahead.
	www.co.washington.or.us /deptmts/lut/news/rnd_bout.htm (594 words)

	Work to begin on roundabout at intersection of Rosemount and Stafford roads (Site not responding. Last check: 2007-11-07)
		Utility crews are expected to begin working at the intersection of Rosemont and Stafford roads in Lake Oswego in the middle of March.
		Approximately one month later, when the crews from Northwest Natural have completed their work, a contractor hired by Clackamas County will begin the actual task of creating a roundabout at the intersection.
		The roundabout is needed to increase the capacity of the intersection, improve safety and reduce delays.
	www.co.clackamas.or.us /press_releases/2005/030705c.htm (143 words)

	NorthEast Area Roundabout Resource Page
		Roundabouts slow all vehicles, provide refuge for pedestrians, and are the only traffic control device in which trees can be planted, fountains can bubble or spray, statutes can sparkle into the next century.
		His roundabouts include freeway interchange roundabouts, single-lane roundabouts, multi-lane roundabouts and the first roundabout in the USA incorporating light rail transit through the center.
		A page on signalized intersections is started - early results indicate most Traffic Lights are foreign made, may cost more to install than Roundabouts & can have significant annual energy consumption, & are useless during flouts (battery backup doubles the cost of an intersection).
	members.cox.net /near (2587 words)

Try your search on: Qwika (all wikis)