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Super-two
A super two, super two-lane highway or wide two-lane is a two-lane surface road built to highway standards with wide lanes and other safety features normally present on a freeway with more lanes, typically including partial control of access, occasional passing lanes and hard shoulders. It is often built for eventual conversion to freeway or at least divided-highway status once traffic volumes rise. Super twos have also been employed because of environmental concerns, such as where Interstate 93 becomes a super two in Franconia Notch, New Hampshire, United States. Ireland In the Republic of Ireland, the term ''wide two-lane'' is used by the National Roads Authority. In policy documents, the designation WS2 is used, which is also used in the UK for a wide single carriageway. Wide two-lane roads are common on national roads, both on less important but medium-capacity routes, and on more important routes not yet upgraded to dual carriageway or motorway. Wide two-lane roads in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
I-93 Franconia Notch
Interstate 93 (I-93) is an Interstate Highway in the New England states of Massachusetts, New Hampshire, and Vermont in the United States. Spanning approximately along a north–south axis, it is one of three primary Interstate Highways located entirely within New England; the other two are I-89 and I-91. The largest cities along the route are Boston, Massachusetts, and Manchester, New Hampshire; it also travels through the New Hampshire state capital of Concord. I-93 begins at an interchange with I-95, US Route 1 (US 1) and Route 128 in Canton, Massachusetts. It travels concurrently with US 1 beginning in Canton, and, with Route 3 beginning at the Braintree Split on the Braintree– Quincy city line, through the Central Artery in Downtown Boston before each route splits off beyond the Leonard P. Zakim Bunker Hill Memorial Bridge. The portion of highway between the Braintree Split and the Central Artery is named the "Southeast Expressway", w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interstate 93
Interstate 93 (I-93) is an Interstate Highway in the New England states of Massachusetts, New Hampshire, and Vermont in the United States. Spanning approximately along a north–south axis, it is one of three primary Interstate Highways located entirely within New England; the other two are I-89 and I-91. The largest cities along the route are Boston, Massachusetts, and Manchester, New Hampshire; it also travels through the New Hampshire state capital of Concord. I-93 begins at an interchange with I-95, US Route 1 (US 1) and Route 128 in Canton, Massachusetts. It travels concurrently with US 1 beginning in Canton, and, with Route 3 beginning at the Braintree Split on the Braintree– Quincy city line, through the Central Artery in Downtown Boston before each route splits off beyond the Leonard P. Zakim Bunker Hill Memorial Bridge. The portion of highway between the Braintree Split and the Central Artery is named the "Southeast Expressway", w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single Carriageway
A single carriageway (British English) or Undivided highway (American English) is a road with one, two or more lanes arranged within a one carriageway with no central reservation to separate opposing flows of traffic. A single-track road has a single lane with passing places for traffic in both directions. Road traffic safety is generally worse for high-speed single carriageways than for dual carriageways due to the lack of separation between traffic moving in opposing directions. Countries Ireland The term ''single carriageway'' is used for roads in the Republic of Ireland. Speed limits on single-carriageway roads vary depending on their classification: national primary roads and national secondary roads have a general speed limit of , while regional roads and local roads have a general speed limit of . In urban areas, the general speed limit is . United Kingdom The maximum UK speed limit for single-carriageway roads is lower than the maximum for dual-carriageway roads. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Two-lane Expressway
A two-lane expressway or two-lane freeway is an expressway or freeway with only one lane in each direction, and usually no median barrier. It may be built that way because of constraints, or may be intended for expansion once traffic volumes rise. The term super two is often used by roadgeeks for this type of road, but traffic engineers use that term for a high-quality surface road. Most of these roads are not tolled. A somewhat related concept is a "four-lane undivided freeway". This is much rarer; a current example is U.S. Route 101 in California through Humboldt Redwoods State Park. In Europe, the concept of ''express road'' encompasses roads which are classified between a motorway and an ordinary road. This concept is recognized both by European Union law and under the UNECE treaty. This type of road is not very standardized, and its geometry may vary from country to country or within a same country. These roads are usually, but not always, reserved for motorized vehicles, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Texas
Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by both List of U.S. states and territories by area, area (after Alaska) and List of U.S. states and territories by population, population (after California). Texas shares borders with the states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexico, Mexican States of Mexico, states of Chihuahua (state), Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the south and southwest; and has a coastline with the Gulf of Mexico to the southeast. Houston is the List of cities in Texas by population, most populous city in Texas and the List of United States cities by population, fourth-largest in the U.S., while San Antonio is the second most pop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2+2 Road
A 2+2 road is a specific type of dual-carriageway that exists primarily in Ireland, Sweden, Estonia and Finland, consisting of two lanes in each direction separated by a steel cable barrier. These roads do not have hard shoulders and therefore cannot be designated as motorways in the future. However, they may be designated as limited-access roads, as such roads do not require the physical standard of motorways to be designated as expressways. The Irish variant has lanes where there are a number of Swedish variants some with lanes. Junctions are generally at-grade roundabouts and minor roads cross under or over the mainline without connecting. They are also known as "type 2 dual-carriageways" by the Irish National Roads Authority. These roads look similar to expressways, except that expressways often have interchanges, large medians or concrete barriers between traffic. History First Irish 2+2 In Ireland first purpose-built road of this type opened in December 2007 as a new ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2+1 Road
2+1 road is a specific category of three-lane road, consisting of two lanes in one direction and one lane in the other, alternating every few kilometres, and usually separated with a steel cable barrier. The second lane allows faster-moving traffic to overtake slower vehicles at regular intervals. Traditional roads of at least width can be converted to 2+1 roads and reach near-motorway safety levels at a much lower cost than an actual conversion to motorway or dual carriageway. Sometimes, during freeway reconstruction, a barrier transfer machine will be used on one half of the freeway while the other is being reconstructed. A similar concept is utilized with 3-lane setups where 2 lanes have right of way, and the opposing side has to yield to the oncoming side on major highways that are mostly 2 lanes, of which those are more common. By country Estonia The construction of 2+1 roads in Estonia first started in autumn 2016, when a contract for a reconstruction of a 9 kilometr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hard Shoulder
A shoulder, hard shoulder (British) or breakdown lane, is an emergency stopping lane by the verge of a road or motorway, on the right side in countries which drive on the right, and on the left side in countries which drive on the left. Many wider (U.S.) freeways, or expressways elsewhere have shoulders on both sides of each directional carriageway — in the median, as well as at the outer edges of the road, for additional safety. Shoulders are not intended for use by through traffic, although there are exceptions. Purpose Shoulders have multiple uses, including: * Emergency vehicles such as ambulances, fire trucks and police cars may use the shoulder to bypass traffic congestion. * In the event of an emergency or breakdown, a motorist can pull into the shoulder to get out of the flow of traffic and obtain a greater degree of safety. * Active traffic management, used on busy multi-lane roads, may allow 'hard shoulder running' by general traffic at reduced speeds during periods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Croom (County Limerick)
Croom () is a village in County Limerick, Ireland. It is located just off the N20 (which has bypassed the town since 2001) on the River Maigue. It is 8 km southeast of Adare on the N20. History Cromadh (now Croom) was a village in the territory of the Uí Fidgenti, and one of the seats of the O’Donovans of the Ui Fidgheinte, which flourished from the late 4th century to the mid 12th century. A hermitage, Dísert Óengusa, was founded nearby by Óengus of Tallaght around the year AD 780. The townland is located on the River Maigue, which although now having a tidal flow only to Adare, in ancient years the river had a tidal flow past Croom, making it a transit route for the Viking ships traversing inland from the Shannon during the 9th and 10th centuries. Contacts arising along the Maigue River between Danish Vikings and the Ui Donnabhains provide an insight into the alliance between the two groups in the late 10th century. John O’Donovan claimed in an appendix ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
N20 Road
The N20 road is a national primary road in Ireland, connecting the cities of Cork and Limerick. Buttevant, Croom, Charleville, Mallow and Blarney are major towns along the route. A short section of the route (from Limerick to Patrickswell) is motorway standard and is designated as the M20 Motorway. Route M20 Rosbrien Interchange (Limerick) to Patrickswell The route starts at junction 1 at the Rosbrien interchange (south of Limerick city) where it connects to the M7 and the N18 which together form the Limerick Southern Ring Road. The route continues from this interchange as motorway. This route was redesignated as motorway in August 2009. The route bypasses Dooradoyle and Raheen, County Limerick, Raheen, through which the old N20 route used to run until the early 2000s. Interchanges and link roads connect to these locations. Two further interchanges are located on the motorway, at either end of Patrickswell. At the latter, the N20 route leaves the main road (which con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grade Separation
In civil engineering (more specifically highway engineering), grade separation is a method of aligning a junction of two or more surface transport axes at different heights (grades) so that they will not disrupt the traffic flow on other transit routes when they cross each other. The composition of such transport axes does not have to be uniform; it can consist of a mixture of roads, footpaths, railways, canals, or airport runways. Bridges (or overpasses, also called flyovers), tunnels (or underpasses), or a combination of both can be built at a junction to achieve the needed grade separation. In North America, a grade-separated junction may be referred to as a ''grade separation'' or as an '' interchange'' – in contrast with an '' intersection'', ''at-grade'', a ''diamond crossing'' or a ''level crossing'', which are not grade-separated. Effects Advantages Roads with grade separation generally allow traffic to move freely, with fewer interruptions, and at higher overall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dual Carriageway
A dual carriageway ( BE) or divided highway ( AE) is a class of highway with carriageways for traffic travelling in opposite directions separated by a central reservation (BrE) or median (AmE). Roads with two or more carriageways which are designed to higher standards with controlled access are generally classed as motorways, freeways, etc., rather than dual carriageways. A road without a central reservation is a single carriageway regardless of the number of lanes. Dual carriageways have improved road traffic safety over single carriageways and typically have higher speed limits as a result. In some places, express lanes and local/collector lanes are used within a local-express-lane system to provide more capacity and to smooth traffic flows for longer-distance travel. History A very early (perhaps the first) example of a dual carriageway was the ''Via Portuensis'', built in the first century by the Roman emperor Claudius between Rome and its port Ostia at the mouth of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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