33-509: (Redirected from I-470 ) Interstate 470 may refer to: Interstate 470 (Kansas) , a loop around Topeka Interstate 470 (Missouri) , a connection at Kansas City Interstate 470 (Ohio–West Virginia) , a loop around Wheeling, West Virginia Three highways which are part of what was once proposed as an Interstate 470 around Denver, Colorado : Colorado State Highway 470 E-470 Northwest Parkway [REDACTED] Topics referred to by
66-417: A dogbone interchange (due to its aerial resemblance to a real or toy dog bone ), and sometimes also called a double roundabout interchange , occurs when the roundabouts do not form a complete circle but instead have a " raindrop " or " teardrop " shape. These two raindrop roundabouts are fused together, forming a single "squashed" roundabout. This configuration reduces conflicts between vehicles entering
99-467: A dumbbell interchange (due to its aerial resemblance to a dumbbell ), and sometimes called a double roundabout interchange . Because roundabouts can generally handle traffic with fewer approach lanes than other intersection types, interchange construction costs can be reduced by eliminating the need for a wider bridge. This configuration allows other roads to form approach legs to the roundabouts and also allows easy U-turns . This type of interchange
132-493: A tight urban diamond interchange ( TUDI ), is sometimes used in areas where there is insufficient right-of-way for a standard diamond interchange. The pair of intersections where the ramps meet the minor road are closely spaced. This spacing forces the turn lanes for each direction to run beside each other, causing the minor road to be wider than it would be if it were a standard diamond. Caltrans classifies this type as Type L-1. A single-point urban interchange ( SPUI )
165-402: Is built with a large over- or clear underpass providing space for a single traffic signal controlled intersection with the ramps and the cross street . Caltrans classifies this type as Type L-13. A contraflow left interchange ( CFL ) is a modified TUDI, once installed at Lyons Road underneath Florida State Road 869 , switching the left turn lanes on the cross street each other and bringing
198-802: Is common in the United Kingdom and Ireland , and is becoming increasingly common in the United States . Examples of dumbbell interchanges in the United States are located on Interstate 35 in Medford , Minnesota, on Interstate 87 in Malta , New York, on Interstate 17 at Happy Valley Road north of Phoenix , Arizona, and on Interstate 80 at California State Route 89 (exit 185) in Truckee , California. An example in Canada
231-481: Is different from Wikidata All article disambiguation pages All disambiguation pages Interstate 470 (Kansas) Interstate 470 ( I-470 ) is a 13.72-mile (22.08 km) loop highway that bypasses the downtown area of Topeka, Kansas . I-470 begins at an interchange with I-70 in western Topeka and heads generally southeast, running concurrent with U.S. Highway 75 (US-75). The concurrency with US-75 ends 5.74 miles (9.24 km) later at
264-679: Is found on the Pat Bay Highway in North Saanich , British Columbia, near Victoria International Airport . One or both roundabouts in the dumbbell interchange may also contain side lanes to increase the capacity. A good example of such a "turbo" dumbbell interchange, which was formerly a half cloverleaf, can be seen in Jülich , Germany at 50°54′51″N 6°19′24″E / 50.914055°N 6.323368°E / 50.914055; 6.323368 . There are interchanges similar to dumbbells in which
297-680: Is listed on the National Highway System , a system of roads that are important to the nation's economy, defense, and mobility. The section of I-470 that now runs along the Kansas Turnpike was opened in 1956 and was the first part of I-470 to be built. After the founding of the Interstate Highway System that same year, several Interstate freeways were planned through Topeka, including I-70 and I-470. Construction began on I-470 after I-70's completion to Topeka. The segment of
330-429: Is not needed. But where traffic volumes are higher, the two intersections within the interchange often feature additional traffic control measures such as traffic lights and extra lanes dedicated to turning traffic. The at-grade variant of the diamond interchange is the split intersection . The ramp intersections may also be configured as a pair of roundabouts to create a type of diamond interchange often called
363-525: The 21st Street interchange is a standard diamond interchange. Through southern Topeka, I-470/US-75 curve to the east-southeast where they intersect Gage Boulevard. Further southeast, US-75 splits away from I-470 at a complex interchange with Burlingame Road. Just east of the US-75 interchange, a trumpet interchange provides access to Topeka Boulevard. The highway then merges onto the Kansas Turnpike , starting
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#1732855625697396-497: The Burlingame Road interchange. I-470 becomes part of the Kansas Turnpike at its junction with I-335 . From there, the highway heads generally northeast through the southeastern sections of Topeka. After traveling 7.03 miles (11.31 km) as the Kansas Turnpike, I-470 reaches its eastern terminus at I-70. The highway has annual average daily traffic (AADT) values as high as 43,000 west of Gage Boulevard to as low as 10,370 near
429-479: The Huntoon Street/Wanamaker Road interchange, traffic leaving eastbound I-470 is deposited onto Huntoon Street. Vehicles merging onto eastbound I-470 must access the entrance ramp from Wanamaker Road. The intersection of Huntoon Street and Wanamaker Road is adjacent to the freeway. The 29th Street/Fairlawn Road interchange is constructed similarly to the Huntoon Street/Wanamaker Road interchange, while
462-541: The I-470 freeway from the I-70 interchange to the Kansas Turnpike, most of which is concurrent with US-75, was built by Koss Construction Company and was under construction until 1960. On October 21, 1960, the western section of I-470 was dedicated by the state highway department and the KTA and opened to traffic. Since completion of the freeway, the route has not been changed. In 1982, I-470
495-510: The Kansas Turnpike near the I-70 interchange and as many as 41,300 vehicles used I-470 daily between the Gage Boulevard interchange and the 29th Street interchange. The portions of I-470 that are part of the Kansas Turnpike fall under the purview of the KTA , which is responsible for operating and maintaining the Kansas Turnpike. Being part of the Interstate Highway System , the entirety of I-470
528-457: The Texas U-turn lanes. A split diamond interchange has its ramps "split" between two crossroads, typically with an exit ramp/entrance ramp pair serving each of the crossroads. The crossroads themselves may be one-way or two-way, and are most often connected by frontage roads, usually one-way. Where HOV lanes are present for carpooling , the ramps of a diamond interchange may be folded to
561-450: The border of the suburbs of Waikiki and Warnbro in the City of Rockingham , Western Australia (at 32°19′29″S 115°46′01″E / 32.32486°S 115.76704°E / -32.32486; 115.76704 ). A tennis ball interchange resembles a dogbone interchange, with the difference being that right turning movements (in a country where traffic drives on the left ) cut through
594-603: The east and joins I-470. The two routes head southeastward along the western edge of the city. Along this stretch of the Interstate, there are three interchanges; Huntoon Street/Wanamaker Road, 21st Street, and 29th Street/Fairlawn Road. Because of both the southeast–northwest alignment of the road and the proximity of two cross-streets, the Huntoon Street/Wanamaker Road and 29th Street/Fairlawn Road interchanges are each made up of two half diamond interchanges , with entrances and exits on two different streets depending on direction. At
627-548: The eastern terminus. As an Interstate Highway, I-470 is a part of the National Highway System . The non-turnpike portions of the highway are maintained by the Kansas Department of Transportation (KDOT), while the turnpike portion is maintained by the Kansas Turnpike Authority (KTA). The Kansas Turnpike was opened in the 1950s, comprising the eastern portion of the route. In the late 1950s, construction began on
660-468: The freeway to save the third traffic signal phase. In a three-level diamond interchange , the cross street is built in a third level with free flowing traffic as a second arterial road . The intersection is split up into four intersections, handling just two conflicting directions each. Its two-level variant is the split diamond interchange. Its at-grade variant is the town center intersection (TCI). A single-leg continuous-flow intersection (CFI)
693-502: The inside lanes instead of the outside. In urban areas this saves some space as well as requiring only one intersection instead of the two one-way intersections, which in rural or suburban areas can be turned into a single-point urban interchange . This in turn reduces waiting time for motorists at traffic lights on the smaller road, which may be a large local thoroughfare with heavy traffic. In Henrietta, New York , Jefferson Road ( NY-252 ) crosses West Henrietta Road ( NY-15 ) on
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#1732855625697726-403: The long left turn phases from the single-point urban interchange to the tight urban diamond interchange at 26°18′04″N 80°11′11″W / 26.301177°N 80.186479°W / 26.301177; -80.186479 . In a diverging diamond interchange ( DDI ) or ( DCD ), the two directions of traffic on the non-freeway road cross to the opposite side on both sides of the bridge at
759-650: The new US 31 freeway under construction in northern Indiana. There are some hybrid interchanges of dumbbell and dogbone having one raindrop and one full roundabout. This is made when the roundabout intersects more roads than the cross street and ramps. Some examples are at exit 38 of the N7 road in Groningen , Netherlands (at 53°12′53″N 6°36′09″E / 53.21462°N 6.602509°E / 53.21462; 6.602509 ); and Ennis Avenue ( National Route 1 ) at Safety Bay Road ( State Route 18 / Tourist Drive 202 ) on
792-413: The off-ramp typically faces a stop sign at the minor road, while traffic turning onto the freeway is unrestricted. The diamond interchange uses less space than most types of freeway interchange, and avoids the interweaving traffic flows that occur in interchanges such as the cloverleaf . Thus, diamond interchanges are most effective in areas where traffic is light and a more expensive interchange type
825-450: The other over a bridge . Approaching the interchange from either direction, an off-ramp diverges only slightly from the freeway and runs directly across the minor road, becoming an on-ramp that returns to the freeway in similar fashion. The two places where the ramps meet the road are treated as conventional intersections . In the United States , where this form of interchange is very common, particularly in rural areas, traffic on
858-681: The raindrop roundabouts from the ramps, reducing queueing and delays, compared with the dumbbell interchange. Direct U-turns are not possible, although the movement can be made by circulating around both raindrop roundabouts. An example of a dogbone interchange in the United States is located on Interstate 70 in Avon, Colorado , United States; more compact examples, which show less of the characteristic "dog bone" shape, are located along Keystone Parkway in Carmel, Indiana , United States. Several interchanges similar to those along Keystone Parkway are being built along
891-461: The ramps do not meet the roundabouts at intersections; these more closely resemble bowtie intersections. One such interchange exists at the junction between the Ruta Interbalnearia and Route 35 North near La Floresta , Uruguay ( 34°44′58″S 55°40′39″W / 34.7495°S 55.6775°W / -34.7495; -55.6775 ). A variation of the dumbbell interchange, often called
924-467: The roundabouts like a regular diamond interchange instead of going around the roundabout. Such a design is found in Perth , Western Australia, between Roe Highway ( State Route 3 ) and Berkshire Road (at 31°58′10″S 116°00′04″E / 31.96945°S 116.00107°E / -31.96945; 116.00107 ). A tight diamond interchange ( TDI ), also known as a compressed diamond interchange or
957-412: The same term This disambiguation page lists articles about roads and streets with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Interstate_470&oldid=1037142872 " Category : Road disambiguation pages Hidden categories: Short description
990-563: The tolled portion of the highway. This junction also marks the northern end of I-335 . I-470 and the Kansas Turnpike head northeast toward I-70. The tollway continues northeastward through southeastern Topeka, passing near to Lake Shawnee and eventually reaching I-470's terminus at I-70 , which the turnpike carries east. The non-turnpike portion of the freeway is maintained by KDOT . As part of this role, KDOT surveys traffic on Kansas highways in terms of AADT . In 2011, KDOT calculated that as few as 10,400 vehicles used I-470 daily along
1023-476: The western portion of I-470, and, on October 21, 1960, the western section of I-470 was dedicated and opened to traffic. In 1982, I-470 was designated as "Martin Luther King Jr. Memorial Highway". The routing of I-470 has not changed since the completion of the highway. I-470 begins on the west side of Topeka at a directional T interchange with I-70 , US-40 , and K-4 . US-75 approaches the interchange from
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1056-530: Was built in 2014 in San Marcos , Texas, at the intersection of Aquarena Springs Drive ( Loop 82 ), Interstate 35 's southbound frontage road and I-35's southbound-to-northbound Texas U-turn . A two-leg CFI, also in San Marcos, was built in 2015 at the intersection of Hopkins Street ( State Highway 80 ), I-35's frontage roads and I-35's Texas U-turns. In both intersections, the displaced left turn lanes merge with
1089-526: Was dedicated as "Martin Luther King Jr. Memorial Highway". The exits on the Kansas Turnpike portion of I-470 follow the Turnpike's mileposts. The entire route is in Topeka , Shawnee County . Diamond interchange A diamond interchange is a common type of road junction , used where a controlled-access highway crosses a minor road. The freeway itself is grade-separated from the minor road, one crossing
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