35-478: The Durham Freeway is a freeway located entirely within Durham County in the U.S. state of North Carolina. It follows: Interstate 885 from I-40 at Research Triangle Park to NC 147 southeast of downtown Durham; and North Carolina Highway 147 from I-885 southeast of downtown Durham to I-85 northwest of downtown Durham. List of roads or other routes with
70-417: 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
105-407: 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
140-493: 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 )
175-465: A short segment of new freeway between NC 147 and US 70, the section of US 70 between Cheek Road and the connector was being realigned and widened to six lanes. Work at the interchange between NC 147 and the connector was expected to be completed in June 2018, but work in that area continued past that date, as the completion date got pushed back to mid-2022. In May 2022, AASHTO approved
210-402: 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
245-841: 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
280-697: 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
315-744: The NC Quick Pass or other interoperable ETC systems. Drivers who do not participate in the ETC program will receive a bill in the mail and will have 30 days from date on bill before additional fees and civil penalties are applied. The first section of what eventually became I-885 to be constructed was the portion of US 70 between the East End Connector and I-85, completed by 1957 with US 70 relocated onto it. The East End Connector first appeared in Durham's 1959 thoroughfare plan but
350-592: The Triangle Expressway , which were redesignated I-885 and NC 885, respectively. The route is cosigned with US 70 from exit 10 to its northern terminus. The route provides a continuous freeway bypass east of downtown Durham and also provides freeway access from I-40 and I-85 to the Research Triangle Park and (via NC 147) to downtown Durham. NC 885 begins at the interchange with NC 540. The whole route carries
385-485: The 2009–2015 Transportation Improvement Plan. In the meantime, as part of a larger widening project on I-85, the early 2000s saw the reconstruction of the US ;70 freeway between I-85 and Cheek Road, widening the section to six lanes and bringing it up to modern Interstate Highway standards as well as adding the missing movements at the interchange with I-85. The I-885 designation did not become public knowledge until
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#1732772475421420-712: The East End Connector Project south to I-40 at a cost of $ 1.8 million. However, the Durham Chapel Hill Carrboro Metropolitan Planning Organization (DCHC MPO) removed this proposal from its plans, leaving this project in question. In 2012, a proposal to extend NC 147 (now NC 885) from its current southern terminus south to McCrimmon Parkway, in Morrisville , was scheduled for re-prioritization. As of October 2020 ,
455-463: 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
490-604: The U.S. state of North Carolina. It links NC 540 and I-40 to I-85 in the Durham area. The route consists of two previously preexisting segments of freeway— NC 147 to the south and US 70 to the north—connected by the East End Connector , which opened to traffic on June 30, 2022. NC 147 was truncated and removed from the southern half of the Durham Freeway and the northern section of
525-454: 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
560-485: The establishment of I-885; this was followed with the East End Connector opening to traffic on June 30, 2022, at which point I-885 was signed on the entirety of its designated corridor. The portion of former NC 147 from NC 540 to I-40 was redesignated as NC 885. The NCDOT 2020–2029 Final STIP released in September 2019 indicated a project that would widen 3.9 miles (6.3 km) of I-885 to six lanes from
595-419: 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 the off-ramp typically faces a stop sign at the minor road, while traffic turning onto
630-407: 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 is not needed. But where traffic volumes are higher, the two intersections within
665-468: 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)
700-502: 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
735-406: 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 a dumbbell interchange (due to its aerial resemblance to
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#1732772475421770-403: 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
805-427: The moniker of the Triangle Expressway , which it inherits from the portion of NC 540 south of the aforementioned interchange. It has a single interchange with Davis Drive and Hopson Road between its termini. NC 885 ends at the interchange with I-40, at which I-885 promptly begins. Running north on the Durham Freeway (former NC 147) through the Research Triangle Park , three closely-spaced interchanges link
840-658: 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
875-446: The project is scheduled for right-of-way acquisition in 2024 and will break ground in 2027. 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 the other over a bridge . Approaching the interchange from either direction, an off-ramp diverges only slightly from
910-689: 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
945-470: 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
980-598: The release of signing plans in 2014, though NCDOT had not yet received approval from the Federal Highway Administration (FHWA). Later sign plans from NCDOT indicated that I-885 was expected to be signed immediately upon the completion of the East End Connector, pending approval from the FHWA. Construction on the East End Connector began in April of the following year. In addition to the construction of
1015-471: 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
1050-407: The route to East Cornwallis Road, T.W. Alexander Drive, and Ellis Road. At the Durham city line, NC 147 begins and diverges toward downtown Durham, while I-885 heads northeast on the East End Connector before joining US 70, curving to the northwest concurrent with the latter route. The freeway turns due north as it comes to US 70 Business (US 70 Bus)/ NC 98 at a junction that
1085-412: The same name [REDACTED] This article includes a list of roads, streets, highways, or other routes that are associated with the same title. 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=Durham_Freeway&oldid=1125344206 " Categories : Lists of roads sharing
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1120-503: The same title Transportation in Durham County, North Carolina Freeways in North Carolina Hidden categories: Articles with short description Short description matches Wikidata All set index articles Interstate 885 Interstate 885 ( I-885 ) and North Carolina Highway 885 ( NC 885 ) is an 11.5-mile (18.5 km) auxiliary Interstate Highway and state highway in
1155-542: 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
1190-460: Was reconstructed as a compressed diamond interchange . After continuing north and meeting Cheek Road, the Interstate ends at a semi-directional T interchange with its parent route, I-85. Tolls along NC 885 are charged by electronic toll collection (ETC) and are enforced by video cameras. Several gantries are located along the route and entrance/exit ramps, where they collect tolls via
1225-565: Was shelved and its funding diverted to other priorities such as NC 147, the Durham Freeway. The portion of NC 147 concurrent with the proposed Interstate opened in the early 1970s, including accommodation for an interchange with the Connector. The project would resurface in the 1990s when the North Carolina Department of Transportation (NCDOT) studied it again, but it would not receive funding until it appeared in
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