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Topic: Parclo

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	Parclo (Partial Cloverleaf) interchanges
		A freeway parclo is essentially a cross between a full cloverleaf interchange and a stack interchange.
		In the same vein as the road parclos, there are countless variations of freeway parclos, which are built to accommodate the lay of the land and adjacent man-made structures.
		For most purposes, the freeway parclo has become the industry standard for connecting two freeways together, as it eliminates the limitations of the full-cloverleaf while not being as expensive and complex to build as the full stack interchange.
	www.donovanmartin.com /roads/parclo.html (417 words)

	Parclo interchange - Wikipedia, the free encyclopedia
		The Parclo A2 and B2 are commonly used on rural freeways such as the Highway 402 and Highway 416, where the ramps can be added without widening the street overpass/underpass to include deceleration lanes (normally needed on the A4 in order to safely enter the loop ramps that lead to the freeway).
		However, as for cloverleaf interchanges between freeways, they are being unwound into partial stack interchanges or made safer with slip ramps as funds permit.
		Various forms of parclo interchanges are used in the Philippines' North Luzon Expressway: a recently-modernized tollway.
	en.wikipedia.org /wiki/Parclo_interchange (962 words)

	Freeway and Road Terms defined
		A partial cloverleaf results when the loop ramps (or right-turning ramps) in a cloverleaf are replaced by flyover ramps, or ramps that intersect the other roadway at a right angle.
		Parclos can exist for both freeway-freeway and freeway-road interchanges.
		The left-turning movement on the main freeway is handled with a large semi-directional ramp that follows the arc of the loop ramp.
	www.donovanmartin.com /roads/terms.html (1220 words)

	Rural Public Transportation Technologies: User Needs and Applications FR1-798
		Modeling accidents to the small data sets for urban parclo and free-flow loop off-ramps and to urban outer connection off-ramps was particularly difficult given the erratic shape of their distributions as shown in appendix D. Loglinear regression models were applied to the accident data in this study.
		Parclo loops (4.7 percent of the available data) and free- flow loops (7.9 percent) were grouped into a single loop/ramp category, due to mathematical difficulties in estimating the interaction term of the model.
		The relative effects show that parclo loop ramps have the highest accident experience, followed by cloverleaf outer connection ramps, diamond ramps, free-flow loop ramps, and direct and semi-direct connection ramps.
	www.tfhrc.gov /safety/pubs/97106/ch05/ch05.htm (10258 words)

	Welcome to Alberta Roads! (Site not responding. Last check: 2007-11-02)
		It is a Parclo AB that will enable free flowing to and from westbound Glenmore Trail.
		This new "Parclo A" interchange was given funding approval in 2002 and is scheduled to be complete by fall 2003.
		A "Parclo B" interchange with access ramps to Southentre Mall was completed at the junction of these two expressways (with Macleod Trail free-flowing under Anderson Road) in October 2001.
	albertaroads.homestead.com /Calgary/newConstruct1.html (155 words)

	Design Scene - Chapter 9, Mn/DOT - OTS
		As stated in the referenced section, the piece of transition curve should be long enough to provide acceleration/deceleration rates of 2 mph/sec desirable, 3 mph/sec maximum, and the ratio of the transition curve radius to the loop radius should not exceed 2:1.
		The taper designs function effectively when used with high-speed ramps, but it is not as clear whether the use of the taper deceleration lane with low-speed ramps and loops is as safe and effective in that application.
		Although there is no formal research available on the subject, the safety record of parclo ‘B’ and parclo ‘AB’ (folded diamond) interchanges featuring standard taper geometry suggests perception/reaction problems by drivers may be leading to run-off-the-road incidents on loops just past the exit terminal.
	www.dot.state.mn.us /tecsup/scene/chapters/scene_9.html (2614 words)

	[No title] (Site not responding. Last check: 2007-11-02)
		A parclo "A" Interchange is being constructed at this intersection that will raise Shawnessy and...
		A parclo "B" interchange that carries Anderson Road over Macleod Trail - and the LRT and CP Rail tracks - with...
		A high-priority project to extend the LRT south to James McKevitt Road by 2001 and construct...
	www.calgarytpo.com /admin_htmlfield.asp?ID=30&table=articles&field=article (169 words)

	The Cloverleaf
		The "Parclo" Interchange: "Parclo" is short for "partial cloverleaf;" that's exactly what this interchange is. It's half cloverleaf, half diamond.
		It only works at the intersection of a freeway and a local road (or, I guess, a local road and another local road.) Basically, the weaving on both highways is solved by eliminating two of the cloverleaf ramps, and replacing them with signalized intersections on the local roadway.
		The interchange to the left is at the intersection of ON 407 and Britannia Road East, west of Toronto, Ontario.
	whereroadsmeet.8k.com /article/clover.htm (1592 words)

	Michigan Highway Ends \| Michigan Route 59
		The Eastern Terminus of M-59 is at a six-ramp parclo interchange with I-94 (Exit 240) northeast of Mount Clemens.
		Interestingly, the M-59 ENDS assembly shown here is located about 0.75 mile east of I-94 along Rosso Hwy., the connecting road between I-94 and the entrance to Selfridge Air National Guard Base.
		The six-ramp parclo interchange featured here also serves as the Southern Terminus of M-29.
	www.state-ends.com /michigan/m/59 (343 words)

	The Dispatch - Serving the Lexington, NC - News (Site not responding. Last check: 2007-11-02)
		At the intersection with Interstate 820, 183 and 121 turn south with the interstate, and all three highways briefly share the same co-signed route.
		Highway 183 leaves I-820 after less than two miles at a parclo interchange with State Highway 10 (a route that formed the original pre-freeway alignment of SH 183).
		After entering the Fort Worth city limits, 183 intersects Interstate 35W in a parclo interchange, then passes the historic Fort Worth Stock Yards.
	www.the-dispatch.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=State_Highway_183_(Texas) (471 words)

	HCM Glossary (Site not responding. Last check: 2007-11-02)
		An access mode to transit in which patrons drive private automobiles or ride bicycles to a transit station, transit stop, or carpool or vanpool waiting area, parking in the areas provided.
		Also called a parclo, it is an interchange with one or two loop ramps.
		A diamond interchange with fewer than four ramps so that not all of the freeway-street or street-freeway movements are served.
	www.aatraffic.com /HCMGlossary.htm (8890 words)

	How To Find The QEII From The Eastern Shore Highways 107 & 7 (Site not responding. Last check: 2007-11-02)
		As you pass a Dairy Queen and McDonald's on your left, make sure you are in the left hand lane as you approach the 8th set of lights.
		This will take you through the intersection leading to the Parclo (formerly called the Micmac Rotary).
		Once you exit the Parclo you will be on a 5-lane highway - the 111 North.
	www.cdha.nshealth.ca /facilities/qe2hsc/directionsandmaps/easternShore107.html (462 words)

	Glossary
		See also Cloverleaf, Parclo, Diamond, Trumpet, T and Stack.
		A variation of the Parclo A4 is the Parclo B4, which just puts the
		PARtial CLOverleaf A4 means four quadrants of the interchange have on and off ramps.
	webfil_92.tripod.com /autoroutes_en/id53.html (1485 words)

	News \| TimesDaily.com \| TimesDaily \| Florence, AL (Site not responding. Last check: 2007-11-02)
		High-level bridges were constructed at Hamilton Harbour (the Burlington Bay James N. Allan Skyway) and the Welland Canal in St. Catharines (the Garden City Skyway) in the 1960s to allow free movement of traffic without the need to stop for drawbridges; tolls on these bridges were eventually removed.
		In 1978, the familiar Stoney Creek traffic circle with Highway 20 Centennial Parkway was removed in favour of a conventional parclo interchange.
		As part of the Red Hill Valley Parkway currently under construction, the Burlington Street and Centennial Parkway interchanges are currently being reconstructed, including the construction of collector lanes on the south (Niagara-bound) side of the highway.
	www.timesdaily.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Queen_Elizabeth_Way (1615 words)

	Three-way interchanges
		It can also be used for a road terminating at a freeway.
		It takes most of its design from the four-way parclo interchange; left-turning movements from the terminating freeway are handled by a single loop ramp, and left turning movements onto the terminating freeway are handled by a large semi-directional ramp that hugs the outer side of the one loop.
		For low to medium traffic environments, the trumpet is usually a good design candidate as it is inexpensive to build because of its single bridge that grade-separates the ending ramps of the terminating freeway and the main freeway.
	www.donovanmartin.com /roads/3way.html (539 words)

	STS Consultants
		STS provided topographical and right-of-way surveying; highway drainage design; preparation of type, size and location plans for structures; complete structure plans for five bridges and several large culverts; preparation of right-of-way plats; and preparation of plans specifications and estimates for the entire project.
		The design of the Route 336/Route 136 interchange included final design of the outer ramps of the Parclo interchange.
		Special slope considerations were included in the eastern half of the project area where some deep cuts and high fills were necessary, in addition to the lake adjacent to the mainline roadway.
	www.stsconsultants.com /projects/trans/route336.html (322 words)

	NY State Route 286 Ends (Site not responding. Last check: 2007-11-02)
		We're at the parclo ramps to and from NY 590 south.
		City limits are just ahead; some sources give the city line as NY 286's terminus, but these photos show differently.
		Street on the right is Fairhaven Road, not an entrance to NY 590 (hence the parclo design).
	www.gribblenation.net /nyends/286.html (385 words)

	Welcome to Alberta Roads!
		This intersection will be built as a Parclo B in the first freeway stage, before becoming a full 'cloverstack' freeway to freeway interchange in the ultimate design.
		An interchange (Parclo AB with all ramps on the north side) will be built here at the same time as the Whitemud interchange.
		This is a "double split" at grade intersection with four sets of traffic lights.
	albertaroads.homestead.com /hwy216/216_1.html (107 words)

	Ohio Highway Ends \| Ohio Route 421
		The western terminus of OH 421 is at a four-ramp parclo interchange with US 42/US 224 west of Lodi.
		OH 421's eastern terminus is also at US 42/US 224, this time northeast of Lodi at a five-ramp parclo interchange.
		In these three pictures is the sequence of exit signs along US 224 West leading up to the interchange for US 42 North and the beginning of OH 421 West.
	www.state-ends.com /ohio/oh/421 (307 words)

	King's Highway 402 - Images
		Despite being of a fairly standard parclo-A configuration, Indian Road is somewhat of an odd design.
		In the early 90s, the SB-WB directional ramp from Indian Line to Highway 402 was removed, thus converting a 6-ramp parclo into a 5-ramp interchange.
		Glendon Drive meets Highway 402 at a 4-ramp parclo b2 interchange.
	www.onthighways.com /hwy_402-403_images/Hwy402_images.htm (995 words)

	[No title]
		OR, take Braemar Drive from MicMac Parclo to lights at foot of Montebello Drive (by Tim Horton's).
		7) from Parclo, take left at first set of lights onto Major Street by the Petro-Canada Station and Smitty’s.
		Park on the road by the super mailbox and the path.
	www.hcw.ns.ca /fields/dartmouthfields.htm (950 words)

	Northern Ireland Motorway Junction Types - NI Roads Site
		The partial cloverleaf ('parclo') interchange is not as common as the roundabout, but it crops up in a few places.
		M1 j7 (Sprucefield): Not a true parclo, this junction was (until it was modified in 2003) really a "trumpet" where one pair of slip roads left in parallel, but the rest of the junction was a roundabout interchange.
		After junction 8 was built, the west-facing slips were both closed.
	www.wesleyjohnston.com /roads/junctiontypes.html (758 words)

	Halifax County United Soccer Club - Dartmouth District Fields (Site not responding. Last check: 2007-11-02)
		Beazley Field - East on Main Street, turn left on to Caledonia Road at lights by Chebucto Ford.
		Brownlow Field - In Dartmouth, follow Circumferential Highway from Burnside/MicMac area toward Eastern Passage (keep left through MicMac Parclo), take exit toward Penhorn Mall.
		7) from Parclo, take left at first set of lights onto Major Street by the Petro-Canada Station and.Smittys Take the first right onto Lakecrest Dr., then the second left onto Raymond St. At the second stop sign, turn right onto Valleyford Ave.
	www.hcusoccer.ca /dartmouth_fields.htm (1891 words)

	Don Valley Parkway - Wikipedia, the free encyclopedia
		full interchange (Parclo A4, formerly a cloverleaf until loop ramps in the NE and SW quadrants were removed in the 1980s)
		full interchange (Parclo AB, formerly a Parclo AB3 until loop ramp in NW quadrant was closed off during reconstruction from fall 2004 to spring 2005.)
		full interchange (Parclo variant with additional overpasses for freeway speed traffic)
	en.wikipedia.org /wiki/Don_Valley_Parkway (1061 words)

	Halifax Dunbrack Soccer Club - Field Conditions and Locations
		Directions: East on Main Street, turn left on to Caledonia Road at lights by Chebucto Ford.
		Directions: In Dartmouth, follow Circumferential Highway from Burnside/MicMac area toward Eastern Passage (keep left through MicMac Parclo), take exit toward Penhorn Mall.
		Proceed to end of Catherine Street, where you will see the field beside Harbourview School.
	www.dunbracksoccer.ns.ca /fields.php?action=1&did=4 (950 words)

	Transportation Project Office (Site not responding. Last check: 2007-11-02)
		The parclo "A" interchange raising Shawnessy and Midlake Boulevards over Macleod Trail, the CP Rail tracks and the future LRT extension was opened to traffic on September 5, 2003.
		This new interchange allows traffic free-flow conditions on Macleod Trail between 162 Avenue S and Lake Fraser Gate.
		Macromedia's Flash player is required to view the map (138k)
	www.calgarytpo.com /default.asp?action=article&ID=49 (136 words)

	Highway Heaven » Interchanges (Site not responding. Last check: 2007-11-02)
		Kansas, that is. Home to Dorothy and Toto, and this interchange:
		This is a very ordinary looking parclo interchange.
		Well, a discussion in misc.transport.road notes that in honor of the 50th anniversary of the Interstate system, several state DOT’s have been celebrating on their websites.
	www.triskele.com /highway/category/interchanges (686 words)

	Geoplan Opus Consultants Inc.
		Route 95 Interchange Survey and Design - Engineering surveys and design for a major turnpike interchange at the junction of Route 95 and the Trans Canada Highway; (1991)
		Route 2 - Dugan Road to Hodgdon Road Survey and Design - Engineering surveys and design for a 6 km portion of the new four lane alignment of the Trans Canada Highway including a parclo interchange at the Hodgdon Road; (1992)
		Miramichi River Bridge #3 Approach Roadway Survey and Design - Engineering surveys and design for the approach roadways to a major bridge structure including 7 km of collector highway; (1990)
	www.geoplan.nb.ca /services.htm (276 words)

	The SABRE Roads Website
		Do you know why this was the case, and if C/D roads were considered?
		>A diamond interchange provided with staggered slip road termini would have taken more land than the parclo alternatives that were specified.)<
		Hmm, I wonder if that's why the roundabout interchange is more or less de-facto...
	groups.msn.com /TheSABRERoadsWebsite/roadsnews.msnw?action=get_message&mview=0&ID_Message=23665&LastModified=4675447421914269867&all_topics=1 (2585 words)

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