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Slip Lane
In road design, a slip lane is a road at a junction that allows road users to change roads without actually entering an intersection. Slip lanes are "helpful... for intersections designed for large buses or trucks to physically make a turn in the space allotted, or where the right turn is sharper than a 90 degree turn." Slip lanes may reduce congestion and "t-bone" motor vehicle collisions, but they increase the risk for pedestrians, cyclists and horse riders who cross the slip lane. Some intersections that are controlled by traffic light offer a slip lane, which allows users to bypass the lights when they turn. That helps ease congestion and improves journey times, as people who are turning do not have to stop at the light but can continue at the same speed. There are two types of slip lanes at intersections: slip lanes that end and require traffic to merge to join the main road, and slip roads that continue onto the main road as another traffic lane. Terminology They are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interchange (road)
In the field of road transport, an interchange (American English) or a grade-separated junction (British English) is a road junction that uses grade separations to allow for the movement of traffic between two or more roadways or highways, using a system of interconnecting roadways to permit traffic on at least one of the routes to pass through the junction without interruption from crossing traffic streams. It differs from a standard Intersection (road), intersection, where roads cross wikt:at-grade, at grade. Interchanges are almost always used when at least one road is a controlled-access highway (freeway) or a limited-access road, limited-access highway (expressway), though they are sometimes used at junctions between surface streets. Terminology ''Note:'' The descriptions of interchanges apply to countries where vehicles Left- and right-hand traffic, drive on the right side of the road. For left-side driving, the layout of junctions is mirrored. Both North American (NA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strong Towns
Strong Towns is an American nonprofit organization dedicated to helping cities and towns in the United States and Canada achieve financial resiliency through civic engagement. The advocacy group points to American post-World War II suburban development as a failure and seeks to improve communities through urban planning concepts such as walkability, mixed-use zoning, and infill development. According to Strong Towns, the group seeks to end highway expansion; encourages localities to use transparent accounting practices in showing the financial impacts of infrastructure, especially suburban infrastructure; build incremental housing; build safe, productive, and human-oriented streets; and end parking mandates and subsidies. Proponents of Strong Towns describe its philosophy as "a conservative vision for community."Hendrix, Michael"A Stronger America Needs ‘Strong Towns’ First,"September 27, 2019, ''The American Conservative,'' retrieved January 29, 2025; also reprinted by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turnaround (road)
In the field of road transport, a turnaround is a type of junction that allows traffic traveling in one direction on a road to efficiently make a U-turn (to reverse course and travel the opposite direction) typically without backing up or making dangerous maneuvers in the middle of the traffic stream. While many junction types permit U-turns, the term ''turnaround'' often applies to road junctions built specifically for this purpose. Junction types designed specifically for U-turns The following road junction types are designed specifically to allow U-turns. * The Texas U-turn allows traffic traveling on one direction of a one-way frontage road, running parallel to a highway, to cross the highway (via a grade separation) and turn onto the other frontage road, traveling in the opposite direction. The term refers to roadworks which are specially built for this purpose; it does not refer to use of an intersecting roadway to navigate between frontage roads. * The median U-turn cros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Texas U-turn
A Texas U-turn, or Texas turnaround, boomerang, or loop around, is a lane allowing cars traveling on one side of a one-way frontage road to U-turn onto the opposite frontage road (typically crossing over or under a freeway or expressway). Typically controlled by yield signs, these allow U-turning traffic to bypass two traffic signals and avoid crossing the local traffic twice. If the limited-access highway passes over the local road, the bridge (or bridges) must be longer, to span four directions of traffic and two sidewalks below. If the local road passes over the limited-access highway, the bridge must be wider, to carry four directions of traffic and two sidewalks over the highway. Usage Texas U-turns in the United States: * This highway configuration originated (and is particularly common) in the U.S. state of Texas, especially in the Austin, Dallas–Fort Worth, El Paso, Houston, and San Antonio metropolitan areas. * A variant is used in Michigan, notably along I-96 and I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Texas T
A Texas T, also called a ''T-ramp,'' is a T-shaped highway ramp that combines entrance and exit ramps into a single structure that allows entrance and exit to the left (inside) lanes of an expressway. It is intended to avoid traffic congestion caused by large numbers of high-occupancy vehicles crossing several lanes near exits. Most highway HOV lanes are the leftmost (inside) lane, while most exits and entrances connect to the rightmost (outside) lane. Immediately after entering the highway, then, high-occupancy vehicles must change lanes several times to get to the HOV lane, and reverse this process when they near their exit. Worse, many HOVs are large transit vehicles such as vans and buses. This lane-crossing can significantly exacerbate congestion, particularly if traffic is already too congested for drivers to comfortably make these lane changes at speed. The Texas T avoids much of this lane-changing by providing vehicles in the left HOV lane (i.e., buses and carpools) with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seagull Intersection
A seagull intersectionJohn Harper, Wal Smart, Michael de Roos''Seagull Intersection Layout. Island Point Road – A Case Study'' 2000 – 2010 or continuous green T-intersection (also known as a turbo-T (in Florida) or High-T intersection (in Nevada and Utah)Nevada DOT''US93 Lakeshore v4 Handouts''/ref>) is a type of 3-way junction, three-way road intersection, usually used on high traffic volume roads and dual carriageways. This form of intersection is popular in Australia and New Zealand, and sometimes used in the United States and other countries. Design Seagull intersections get their name from the pattern that the two cross-traffic turn lanes make when looking down at them from the air. In a seagull intersection, one or more lanes of traffic on the arterial road, on the carriageway opposite the intersecting side road, are free-flow interchange, free flowing, that is, one direction of traffic on the arterial is allowed to travel straight through without stopping. The free- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quadrant Roadway Intersection
A quadrant roadway intersection adds an additional "quadrant roadway" between two legs of an intersection (road), intersection. This roadway adds two three-way junction, three-way intersections in addition to the original four-way intersection, moving all left turns (in right- and left-hand traffic, right-hand traffic countries) or right turns (in right- and left-hand traffic, left-hand traffic countries) from the main intersection. The design is intended to improve traffic flow by reducing signal timing phases from four to two in the main intersection. The design is intended for intersections where large artery routes meet in an area of dense development and high pedestrian volume. Proponents also point to a reduction in places where accidents could occur from vehicles potentially crossing paths, as well as a low development cost compared to roundabouts or the more complex single-point urban interchange designs. Opponents point to the increase in points where accidents could occu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hook Turn
A hook turn (Australian English) or two-stage turn (British English), also known as a Copenhagen Left (in reference to cyclists specifically and in countries they are ridden on the right), is a road cycling manoeuvre or a motor vehicle traffic-control mechanism in which vehicles that would normally turn from the innermost lane of an intersection instead turn from the outermost lane, across all other lanes of traffic. Hook turns are commonly used by cyclists as a safer alternative to merging with motor vehicles, or having to cross multiple lanes of traffic to reach a turning lane. The legal use of hook turns by motor vehicles is relatively rare, but has been implemented in some jurisdictions (notably Melbourne, Australia) to keep the centre of a road free from congestion for use by light rail transit such as trams or other dedicated road services. History Hook turns were originally the standard right turn in Australia. Various jurisdictions phased them out at different times. Sy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continuous-flow Intersection
A continuous flow intersection (CFI), also called a crossover displaced left-turn (XDL or DLT), is an alternative design for an intersection (road), at-grade road junction. Vehicles attempting to turn across the opposing direction of traffic (left in right- and left-hand traffic, right-hand drive jurisdictions; right in left-hand drive jurisdictions) cross before they enter the intersection. No left turn signal in the intersection is then necessary. Instead, vehicles traveling in both directions can proceed, including through vehicles and those turning right or left, when a generic traffic signal/stop sign permits. Its design also is promoted as part of the Federal Highway Administration's Every Day Counts initiative which started in 2011. History A fly-over designed CFI interchange (road), interchange (separated grade) was invented by Francisco Mier. An intersection (at-grade) variant followed. Over 40 have been implemented since 2000. Mier patented his design and required a f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advanced Stop Line
An advanced stop line (ASL), also called advanced stop box or bike box, is a type of road marking at signalised road junctions allowing certain types of vehicle a head start when the traffic signal changes from red to green. Advanced stop lines are implemented widely in Denmark, the United Kingdom, and other European countries. Description Most commonly associated with bicycles, they may also be provided for buses and motorcycles. There are two parallel stop lines at the intersection, the first one at which all traffic except that for which the facility is provided must stop, and a second one nearer the intersection to which only specified vehicles may proceed. If the signals change to red when a vehicle is crossing the first line, the driver must stop at the second line The area between the stop lines is the "reservoir" or "box". Signage may be required to inform road users as to the meaning of the extra stop line. A separate set of traffic signals may be provided for the sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stop Sign
A stop sign is a traffic sign designed to notify drivers that they must come to a complete stop and make sure the intersection (road), intersection (or level crossing, railroad crossing) is safely clear of vehicles and pedestrians before continuing past the sign. In many countries, the sign is a red octagon with the word ''STOP'', in either English, the national language of that particular country, or both, displayed in white or yellow. The Vienna Convention on Road Signs and Signals also allows an alternative version: a red circle with a red inverted triangle with either a white or yellow background, and a black or dark blue ''STOP''. Some countries may also use other types, such as Japan's inverted red triangle stop sign. Particular regulations regarding appearance, installation, and compliance with the signs vary by some jurisdictions. Design and configuration The 1968 Vienna Convention on Road Signs and Signals allows for two types of stop signs as well as several acceptable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
