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Superstreet

January 01, 1970

For the air combat maneuver also known as the "J-turn", see Herbst maneuver. For the driving maneuver also known as the "J-turn", see J-turn. For the "SuperStreet" race format, see Supercars Championship § SuperStreet.
This article reflects countries that drive on the right. For countries that drive on the left, reverse right and left.

A superstreet, also known as a restricted crossing U-turn (RCUT), J-turn,[1] or reduced conflict intersection (RCI),[2] is a type of road intersection that is a variation of the Michigan left. In this configuration, in contrast to the Michigan left, traffic on the minor road is not permitted to proceed straight across the major road or highway. Drivers on the minor road wishing to turn left or go straight must turn right onto the major road, then, a short distance away, queue (wait) into a designated U-turn (or crossover) lane in the median. When traffic clears, they complete the U-turn and then either go straight or make a right turn when they intersect the other half of the minor road.

At a superstreet, crossroad traffic intersecting with a main thoroughfare is restricted from any direct crossing or left turns. Traffic may only turn right, merging onto the main road, which then provides U-turn lane access and allows for left (or right) turns onto the intersecting crossroad. The opposite applies for countries that drive on the left.

The superstreet typically requires four traffic light-controlled intersections, and most traffic must pass through two of them, but each light has only two phases, greatly increasing average traffic flow; there is no need for numerous left-turn phases where most traffic is waiting for only a few cars to clear the intersection. Turning movements on roads with lower cross-traffic volumes may be controlled with stop or yield signs for turning traffic rather than with signals.

Variations edit

A (standard) RCUT, in contrast to a Michigan left, typically allows left turns from the major road to minor roads. A variation, designated by the US Federal Highway Administration (FHWA) as a basic RCUT, prohibits such turns, restricting movements to right-in/right-outs and median U-turns only.) When the median is relatively narrow, a "bulb-out" or "loon" protrudes from the roadway, opposite from the median crossover, to accommodate a U-turn by a long vehicle, such as a tractor trailer.[3]

Practicality edit

Superstreets are not very common because they require substantial right-of-way to provide a median that can accommodate truck traffic. Inconvenience to traffic on the minor road is mostly a perception issue and does not represent additional delay in most cases. [citation needed] However, superstreets are cheaper to construct than controlled-access highways and improve the flow of traffic on the major road.

Examples edit

In Port St. Lucie, Florida, the first superstreet in Florida was opened in late 2019 at the intersection of Crosstown Parkway and Floresta Drive.[4]

In May 2015, a superstreet was constructed on US 41 at SR 114 on the border between Morocco and Beaver Township in Newton County, Indiana. The state of Indiana makes a distinction between an RCUT, which it defines as having a traffic light-controlled main intersection, and a J-turn or RCI, which it defines as having the main intersection controlled by stop or yield signs.[5] Two examples of what Indiana calls a "J-turn" opened on June 30, 2016 at the intersections of US 231 with IN 62 and IN 68 near Dale. Traffic on the state roads at both intersections can only turn right, while US 231 traffic can turn left at both intersections.[6]

Troy, Michigan has a superstreet on West Big Beaver Road at Lakeview Drive. 42°33′41″N 83°10′53″W / 42.561383°N 83.181310°W / 42.561383; -83.181310. A simpler implementation is seen in Washington Township, Macomb County, Michigan at M-53 and 30 Mile Road. 42°46′21″N 83°00′33″W / 42.7726°N 83.0091°W / 42.7726; -83.0091

Lake Elmo, Minnesota has a superstreet intersection on MN 36 at Keats Avenue (45°02′08″N 92°54′14″W / 45.0356°N 92.9038°W / 45.0356; -92.9038).[citation needed]

In North Carolina, five superstreet intersections were included as a part of U.S. Route 17's recent upgrades near Wilmington, North Carolina (34°12′58″N 78°01′08″W / 34.21603°N 78.018969°W / 34.21603; -78.018969).[citation needed][when?] There are also five superstreet intersections in Holly Springs along the NC 55 bypass.[7] US221 from the South Carolina stateline north to the US74 interchange is of superstreet construction

In 2011, Ohio State Route 4 Bypass in Butler County, Ohio, was reconfigured with three superstreet intersections.[8] The Ohio Department of Transportation (ODOT) is also planning to build a superstreet on US 127 at Kruckeberg Road in Greenville Township, Darke County beginning in summer 2019. ODOT materials make a distinction between the project's standard RCUT design, which ODOT terms a "partial RCUT", and what the FHWA calls a "basic RCUT", which ODOT terms an "RCUT" or a "full RCUT".[9][10]

In Texas in 2010, several intersections on US 281 were converted to superstreet in the northern San Antonio neighborhood of Stone Oak, north of Loop 1604, to relieve rush hour congestion.[11][12][13] This superstreet was removed in 2019 following the start of construction to convert US 281 into a full freeway. In northwest San Antonio in 2011, two intersections on Loop 1604, north of State Highway 151, were converted to superstreet.[14][15] These intersections, however, were also removed when 1604 was upgraded to freeway status in the area. In Austin, a superstreet was built on February 19, 2013, at the intersection of SH 71 and Farm to Market Road 973 east of Austin-Bergstrom International Airport not far from the eastern boundary of the Austin city limits. This becomes the city of Austin's first superstreet and the second city in Texas to feature this intersection design.[16] This superstreet was removed in 2019[17] following the construction of the SH 71 Toll Lane. Another superstreet exists in Austin on Loop 360 between the intersections of Loop 1 and US 290 which provides access to Barton Creek Plaza. This superstreet allows southbound traffic on Loop 360 to travel from Loop 1 to US 290 without going through any traffic lights.

Benefits edit

A study showed a 20 percent overall reduction in travel time compared to similar intersections that use conventional traffic designs; intersections experience an average of 46 percent fewer reported automobile collisions – and 63 percent fewer collisions that result in personal injury.[18]

This design also is promoted as part of the FHWA's Every Day Counts initiative which started in 2011.[19]

See also edit

References edit

  1. ^ Staff (October 2009). "Techbrief: Restricted Crossing U-Turn Intersection (FHWA-HRT-09-059)". Alternative Intersections/Interchanges: Information Report (AIIR) (FHWA-HRT-09-060). Federal Highway Administration. Retrieved August 24, 2012.
  2. ^ Minnesota Department of Transportation, Reduced Conflict Intersections, accessed November 2014
  3. ^ Staff (March 8, 2016) [April 2010]. "Restricted Crossing U-Turn Intersection". Alternative Intersections/Interchanges: Informational Report (AIIR) (Technical report). Washington, D.C.: Federal Highway Administration. FHWA-HRT-09-060. Retrieved June 24, 2017.
  4. ^ "New Traffic Configuration at Crosstown & Floresta Dr". City of Port St. Lucie, Florida. August 5, 2019. Retrieved January 19, 2020.
  5. ^ "Traffic Operations: Median U-Turns". Indiana Department of Transportation. Retrieved June 24, 2017.
  6. ^ Taylor, Britney (June 29, 2016). "J-Turns At U.S. 231 Intersection To Open Near Dale, Indiana". Evansville, Indiana: WEVV-TV. Retrieved July 10, 2017.
  7. ^ Kenney, Andrew. "Traffic rolls onto new Holly Springs superstreet". News & Observer. Retrieved 3 December 2013.
  8. ^ "State Route 4 Bypass Widening". Butler County Transportation Improvement District. July 21, 2011. Retrieved December 11, 2017.
  9. ^ Martin, Erik (June 15, 2017). . The Daily Advocate. Greenville, Ohio. Archived from the original on December 12, 2017. Retrieved June 17, 2017.
  10. ^ "Feasibility Study: WYA-23 Intersection Improvements" (PDF). Ohio Department of Transportation. August 2021. PID 109362. (PDF) from the original on April 10, 2022. Retrieved April 10, 2022.
  11. ^ New, Brian (March 11, 2010). "Super street construction on US 281 to begin on Monday". KENS. Retrieved March 23, 2013.
  12. ^ "US281 Superstreet". 4-1-1 on 281. Alamo Regional Mobility Authority. Retrieved March 23, 2013.
  13. ^ "Loop 360 - Archive: Innovative Intersections: The Superstreet (RCUT)". Texas Department of Transportation. Retrieved March 23, 2013.
  14. ^ "Loop 1604 Super Street". Alamo Regional Mobility Authority. Retrieved March 23, 2013.
  15. ^ "Loop 1604 superstreet promises easier flow". KENS. September 15, 2011. Retrieved March 23, 2013.
  16. ^ "Super street coming to East Austin". Austin, TX: KVUE-TV. February 19, 2013. Retrieved February 19, 2013.
  17. ^ "Austin Tollway Regional Map". Central Texas Regional Mobility Aushority. Retrieved May 31, 2020.
  18. ^ PhysOrg: No left turn: 'Superstreet' traffic design improves travel time, safety
  19. ^ Schroeder, Bastian; Cunningham, Chris; Ray, Brian; Daleiden, Andy; Jenior, Pete; Knudsen, Julia (August 2014). Diverging Diamond Interchange Informational Guide (PDF). Washington, DC: Federal Highway Administration Office of Safety.

External links edit

  • Federal Highway Administration, Alternative Intersection Treatments - Super-street Median Crossover
  • Federal Highway Administration, Restricted Crossing U-Turn Intersection Informational Guide
  • North Carolina DOT - proposed superstreet in Chapel Hill (note: this project does not include the left turns from the main road)
  • North Carolina State University, Institute for Transportation Research and Education - Operational superstreets in the United States
  • Brunswick Beacon article Superstreet considered for U.S. 17
  • Information on two superstreets in San Antonio, including detailed illustrations of the various traffic flows.
  • FHWA: RCUT Case Study – Bypass 55 Corridor in Holly Springs (North Carolina), published July 31, 2014

January 01, 1970
superstreet, combat, maneuver, also, known, turn, herbst, maneuver, driving, maneuver, also, known, turn, turn, superstreet, race, format, supercars, championship, superstreet, this, article, reflects, countries, that, drive, right, countries, that, drive, lef. For the air combat maneuver also known as the J turn see Herbst maneuver For the driving maneuver also known as the J turn see J turn For the SuperStreet race format see Supercars Championship SuperStreet This article reflects countries that drive on the right For countries that drive on the left reverse right and left A superstreet also known as a restricted crossing U turn RCUT J turn 1 or reduced conflict intersection RCI 2 is a type of road intersection that is a variation of the Michigan left In this configuration in contrast to the Michigan left traffic on the minor road is not permitted to proceed straight across the major road or highway Drivers on the minor road wishing to turn left or go straight must turn right onto the major road then a short distance away queue wait into a designated U turn or crossover lane in the median When traffic clears they complete the U turn and then either go straight or make a right turn when they intersect the other half of the minor road At a superstreet crossroad traffic intersecting with a main thoroughfare is restricted from any direct crossing or left turns Traffic may only turn right merging onto the main road which then provides U turn lane access and allows for left or right turns onto the intersecting crossroad The opposite applies for countries that drive on the left The superstreet typically requires four traffic light controlled intersections and most traffic must pass through two of them but each light has only two phases greatly increasing average traffic flow there is no need for numerous left turn phases where most traffic is waiting for only a few cars to clear the intersection Turning movements on roads with lower cross traffic volumes may be controlled with stop or yield signs for turning traffic rather than with signals Contents 1 Variations 2 Practicality 3 Examples 4 Benefits 5 See also 6 References 7 External linksVariations editA standard RCUT in contrast to a Michigan left typically allows left turns from the major road to minor roads A variation designated by the US Federal Highway Administration FHWA as a basic RCUT prohibits such turns restricting movements to right in right outs and median U turns only When the median is relatively narrow a bulb out or loon protrudes from the roadway opposite from the median crossover to accommodate a U turn by a long vehicle such as a tractor trailer 3 Practicality editSuperstreets are not very common because they require substantial right of way to provide a median that can accommodate truck traffic Inconvenience to traffic on the minor road is mostly a perception issue and does not represent additional delay in most cases citation needed However superstreets are cheaper to construct than controlled access highways and improve the flow of traffic on the major road Examples editIn Port St Lucie Florida the first superstreet in Florida was opened in late 2019 at the intersection of Crosstown Parkway and Floresta Drive 4 In May 2015 a superstreet was constructed on US 41 at SR 114 on the border between Morocco and Beaver Township in Newton County Indiana The state of Indiana makes a distinction between an RCUT which it defines as having a traffic light controlled main intersection and a J turn or RCI which it defines as having the main intersection controlled by stop or yield signs 5 Two examples of what Indiana calls a J turn opened on June 30 2016 at the intersections of US 231 with IN 62 and IN 68 near Dale Traffic on the state roads at both intersections can only turn right while US 231 traffic can turn left at both intersections 6 Troy Michigan has a superstreet on West Big Beaver Road at Lakeview Drive 42 33 41 N 83 10 53 W 42 561383 N 83 181310 W 42 561383 83 181310 A simpler implementation is seen in Washington Township Macomb County Michigan at M 53 and 30 Mile Road 42 46 21 N 83 00 33 W 42 7726 N 83 0091 W 42 7726 83 0091Lake Elmo Minnesota has a superstreet intersection on MN 36 at Keats Avenue 45 02 08 N 92 54 14 W 45 0356 N 92 9038 W 45 0356 92 9038 citation needed In North Carolina five superstreet intersections were included as a part of U S Route 17 s recent upgrades near Wilmington North Carolina 34 12 58 N 78 01 08 W 34 21603 N 78 018969 W 34 21603 78 018969 citation needed when There are also five superstreet intersections in Holly Springs along the NC 55 bypass 7 US221 from the South Carolina stateline north to the US74 interchange is of superstreet constructionIn 2011 Ohio State Route 4 Bypass in Butler County Ohio was reconfigured with three superstreet intersections 8 The Ohio Department of Transportation ODOT is also planning to build a superstreet on US 127 at Kruckeberg Road in Greenville Township Darke County beginning in summer 2019 ODOT materials make a distinction between the project s standard RCUT design which ODOT terms a partial RCUT and what the FHWA calls a basic RCUT which ODOT terms an RCUT or a full RCUT 9 10 In Texas in 2010 several intersections on US 281 were converted to superstreet in the northern San Antonio neighborhood of Stone Oak north of Loop 1604 to relieve rush hour congestion 11 12 13 This superstreet was removed in 2019 following the start of construction to convert US 281 into a full freeway In northwest San Antonio in 2011 two intersections on Loop 1604 north of State Highway 151 were converted to superstreet 14 15 These intersections however were also removed when 1604 was upgraded to freeway status in the area In Austin a superstreet was built on February 19 2013 at the intersection of SH 71 and Farm to Market Road 973 east of Austin Bergstrom International Airport not far from the eastern boundary of the Austin city limits This becomes the city of Austin s first superstreet and the second city in Texas to feature this intersection design 16 This superstreet was removed in 2019 17 following the construction of the SH 71 Toll Lane Another superstreet exists in Austin on Loop 360 between the intersections of Loop 1 and US 290 which provides access to Barton Creek Plaza This superstreet allows southbound traffic on Loop 360 to travel from Loop 1 to US 290 without going through any traffic lights Benefits editA study showed a 20 percent overall reduction in travel time compared to similar intersections that use conventional traffic designs intersections experience an average of 46 percent fewer reported automobile collisions and 63 percent fewer collisions that result in personal injury 18 This design also is promoted as part of the FHWA s Every Day Counts initiative which started in 2011 19 See also editMichigan leftReferences edit Staff October 2009 Techbrief Restricted Crossing U Turn Intersection FHWA HRT 09 059 Alternative Intersections Interchanges Information Report AIIR FHWA HRT 09 060 Federal Highway Administration Retrieved August 24 2012 Minnesota Department of Transportation Reduced Conflict Intersections accessed November 2014 Staff March 8 2016 April 2010 Restricted Crossing U Turn Intersection Alternative Intersections Interchanges Informational Report AIIR Technical report Washington D C Federal Highway Administration FHWA HRT 09 060 Retrieved June 24 2017 New Traffic Configuration at Crosstown amp Floresta Dr City of Port St Lucie Florida August 5 2019 Retrieved January 19 2020 Traffic Operations Median U Turns Indiana Department of Transportation Retrieved June 24 2017 Taylor Britney June 29 2016 J Turns At U S 231 Intersection To Open Near Dale Indiana Evansville Indiana WEVV TV Retrieved July 10 2017 Kenney Andrew Traffic rolls onto new Holly Springs superstreet News amp Observer Retrieved 3 December 2013 State Route 4 Bypass Widening Butler County Transportation Improvement District July 21 2011 Retrieved December 11 2017 Martin Erik June 15 2017 State agrees to fund 127 Kruckeberg intersection reconstruction The Daily Advocate Greenville Ohio Archived from the original on December 12 2017 Retrieved June 17 2017 Feasibility Study WYA 23 Intersection Improvements PDF Ohio Department of Transportation August 2021 PID 109362 Archived PDF from the original on April 10 2022 Retrieved April 10 2022 New Brian March 11 2010 Super street construction on US 281 to begin on Monday KENS Retrieved March 23 2013 US281 Superstreet 4 1 1 on 281 Alamo Regional Mobility Authority Retrieved March 23 2013 Loop 360 Archive Innovative Intersections The Superstreet RCUT Texas Department of Transportation Retrieved March 23 2013 Loop 1604 Super Street Alamo Regional Mobility Authority Retrieved March 23 2013 Loop 1604 superstreet promises easier flow KENS September 15 2011 Retrieved March 23 2013 Super street coming to East Austin Austin TX KVUE TV February 19 2013 Retrieved February 19 2013 Austin Tollway Regional Map Central Texas Regional Mobility Aushority Retrieved May 31 2020 PhysOrg No left turn Superstreet traffic design improves travel time safety Schroeder Bastian Cunningham Chris Ray Brian Daleiden Andy Jenior Pete Knudsen Julia August 2014 Diverging Diamond Interchange Informational Guide PDF Washington DC Federal Highway Administration Office of Safety External links editFederal Highway Administration Alternative Intersection Treatments Super street Median Crossover Federal Highway Administration Restricted Crossing U Turn Intersection Informational Guide North Carolina DOT proposed superstreet in Chapel Hill note this project does not include the left turns from the main road North Carolina State University Institute for Transportation Research and Education Operational superstreets in the United States Brunswick Beacon article Superstreet considered for U S 17 Information on two superstreets in San Antonio including detailed illustrations of the various traffic flows FHWA RCUT Case Study Bypass 55 Corridor in Holly Springs North Carolina published July 31 2014 Retrieved from https en wikipedia org w index php title Superstreet amp oldid 1167041842, wikipedia, wiki, book, books, library,

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