Intersection has various meanings in different contexts: In road transport, an intersection is a place where two roads meet. If there is a grade separation, it is an interchange. In mathematics (in particular, set theory), an intersection is the set of elements common to some collection of sets. In aviation, an intersection is an virtual navigational fix In post-classical cinema, Intersection (1994) is Mark Rydell's remake of Claude Sautet's 1970 French film, Les Choses de la vi

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See also:

Intersection road, Intersection road - Types of intersections

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The various types of at-grade intersections have different names. Examples are intersection (roads) and level junction (railways). Some of them can also mix transportation modalities. An example of this is the railway grade crossing (American English) or level crossing (British English) where a roads cross railways at grade. At-grade intersection - At-grade intersections on freeways. Freeways, as limited access highways, normally have grade-separated interchanges. In particular, this is required of freewa ...

See also:

At-grade intersection, At-grade intersection - Traffic management, At-grade intersection - Examples, At-grade intersection - At-grade intersections on freeways

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An at-grade intersection is a junction at which two or more transport axes cross at the same level (or grade). At-grade intersection - Traffic management. With areas of high or fast traffic, an at-grade intersection normally requires a traffic control device such as a stop sign or traffic light or railway signal to manage conflicting traffic. Grade separation, Intersection (road), Level crossing, Level junction, List of gaps in Interstate Highways At-gr ...

Including:

• At-grade intersection - Traffic management
• At-grade intersection - Examples
• At-grade intersection - At-grade intersections on freeways

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A continuous flow intersection, also called a CFI, is an at-grade intersection that moves the turn conflict (to the left where traffic drives on the right and vice versa) out of the main intersection. A CFI moves the left-turn down the road several hundred feet eliminating the left-turn traffic light phase. The CFI was invented in Mexico where over 40 have been implemented over the past decade. The amount of land required to implement this conc ...

Including:

• Continuous flow intersection - Operation details

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42nd Street is a major crosstown street in the New York City borough of Manhattan, known for its theaters, especially near the intersection with Broadway at Times Square. It is also the name of the region of the theater district (and, at times, the red-light district) near that intersection. 42nd Street has held a special place in New York lingo since at least the turn of the twentieth century. The Lincoln Highway, conceived in 1913 as America's first transcontinental highway, used the portion of 42nd Street west of Times Squar ...

Including:

• 42nd Street Manhattan - History
• 42nd Street Manhattan - Recent changes
• 42nd Street Manhattan - Public transit
• 42nd Street Manhattan - Places along 42nd Street
• 42nd Street Manhattan - Intersections from east to west

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The algebra of sets develops and describes the basic properties and laws of sets, the set-theoretic operations of union, intersection, and complementation and the relations of set equality (mathematics) and set inclusion. It also provides systematic procedures for evaluating expressions, and performing calculations, involving these operations and relations. Algebra of sets - Introduction. The algebra of sets is the development of the fundamental properties of set operations and set relations. These properti ...

Including:

• Algebra of sets - Introduction
• Algebra of sets - The fundamental laws of set algebra
• Algebra of sets - The principle of duality
• Algebra of sets - Some additional laws for unions and intersections
• Algebra of sets - Some additional laws for complements
• Algebra of sets - The algebra of inclusion
• Algebra of sets - The algebra of relative complements

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The various types of at-grade intersections have different names. Examples are intersection (roads) and level junction (railways). Some of them can also mix transportation modalities. An example of this is the railway grade crossing (American English) or level crossing (British English) where a roads cross railways at grade. At-grade intersection - At-grade intersections on freeways. Freeways, as limited access highways, normally have grade-separated interchanges. In particular, this is required of freewa ...

See also:

At-grade intersection, At-grade intersection - Traffic management, At-grade intersection - Examples, At-grade intersection - At-grade intersections on freeways

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The most general notion is the intersection of an arbitrary nonempty collection of sets. If M is a nonempty set whose elements are themselves sets, then x is an element of the intersection of M if and only if for every element A of M, x is an element of A. In symbols: This idea subsumes the above paragraphs, in that for example, A ∩B ∩C ...

See also:

Intersection set theory, Intersection set theory - Basic definition, Intersection set theory - Arbitrary intersections, Intersection set theory - Nullary intersection

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Note that in the previous section we excluded the case where M was the empty set (∅). The reason is the follows. The intersection of the collection M is defined as the set (see set-builder notation) If M is empty there are no sets A in M, so the question becomes "which x's satisfy the stated condition?" The answer seems to be every possible x. When M is empty the condition given above is an example of a vacuous truth. So the intersection of the empty family ...

See also:

Intersection set theory, Intersection set theory - Basic definition, Intersection set theory - Arbitrary intersections, Intersection set theory - Nullary intersection

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The class ZPP is exactly equal to the intersection of the classes RP and Co-RP. This is often taken to be the definition of ZPP. To show this, first note that every problem which is in both RP and co-RP has a Las Vegas algorithm as follows: Suppose we have a language L recognized by both the RP algorithm A and the (possibly completely different) co-RP algorithm B. Given an input in L, run A on the input. If it returns YES, the answer must be YES. Otherwise, run B on the input. If it returns NO, the answer must be ...

See also:

ZPP, ZPP - Intersection definition, ZPP - Connection to other classes, ZPP - External link

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intersection

The interceding of an apparition with the point of consciousness of the perceiver. The apparition may be of the dreaming consciousness of a living person or that of a discarnate

(See also: Intersection, Body Mind and Soul)

The intersection of A and B is written "A ∩ B". Formally: x is an element of A ∩ B if and only if x is an element of A and x is an element of B. For example, the intersection of the sets {1, 2, 3} and {2, 3, 4} is {2, 3}. The number 9 is not contained in the intersection of the set of prime numbers {2, 3, 5, 7, 11, … ...

See also:

Intersection set theory, Intersection set theory - Basic definition, Intersection set theory - Arbitrary intersections, Intersection set theory - Nullary intersection

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Curb cuts placed at street intersections allow someone in a wheelchair, on a toddler's tricycle etc., to move onto or off of a sidewalk without difficulty. A pedestrian using a walker or cane, pushing a stroller or buggy, pushing or pulling a cart or walking next to a bicycle also benefits from a curb cut. It can also be used by someone on a bicycle, roller skates, skateboard, etc. For the safety ...

See also:

Curb cut, Curb cut - Curb cuts at intersections, Curb cut - Other curb cuts

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An interesting polyhedron can be constructed from five intersecting tetrahedra. This compound of five tetrahedra has been known for hundreds of years. It comes up regularly in the world of origami. Joining the twenty vertices would form a regular dodecahedron. There are both left-handed and right-handed forms which are mirror images of each other. Tetrahed ...

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Tetrahedron, Tetrahedron - Area and volume, Tetrahedron - Geometric relations, Tetrahedron - Related polyhedra, Tetrahedron - Intersecting tetrahedra, Tetrahedron - The isometries of the regular tetrahedron, Tetrahedron - The isometries of irregular tetrahedra, Tetrahedron - Computational uses, Tetrahedron - Trivia

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Side collisions at intersections occur when the front or rear of one vehicle strikes the side of another vehicle. These collisions are also referred to as broadside or t-bone collisions. The type(s) of vehicle damage and vehicle occupant injuries vary based on the part of the vehicle that is struck, the speeds of both involved vehicles, and the weights and construction of the involved vehicles. When a vehicle is hit on the side, the crumple zones of the striking vehicle will absorb some of the energy of the collision. Th ...

See also:

Side collision, Side collision - Side collisions at intersections, Side collision - Collisions occurring while passing

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A new set can also be constructed by determining which members two sets have "in common". The intersection of A and B, denoted by A ∩ B, is the set of all things which are members of both A and B. If A ∩ B  =  ø, then A and B are said to be disjoint. Examples: {1, 2} ∩ {red, white} = ø {1, 2, green} ∩ {red, white, green} = {green} {1, 2} ∩
...

See also:

Set, Set - Definition, Set - Describing sets, Set - Descriptions using words or lists, Set - Descriptions using mathematical notation, Set - Set membership, Set - Cardinality of a set, Set - Subsets, Set - Special sets, Set - Unions, Set - Intersections, Set - Complements

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For some types of bounding volume (OBB and Convex Polyhedra), an effective check is that of the "Separating Axis Test". The idea here is that, if there exists an axis by which the objects do not overlap, then the objects do not intersect. Usually the axes checked are those of the basic axes for the volumes (the unit axes in the case of an AABB, or the 3 base axes from each OBB in the case of OBBs). Often, this is followed by also checking the cro ...

See also:

Bounding volume, Bounding volume - Uses of bounding volumes, Bounding volume - Common types of bounding volume, Bounding volume - Basic Intersection Checks, Bounding volume - External link

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The principle of inclusion-exclusion, combined with de Morgan's theorem, can be used to count the intersection of sets as well. Let A be some universal set such that for each k, and let represent the complement of Ak with respect to A. Then we have thereby turning the problem of finding an intersection into the problem of finding a union. This article incorporates material from principle of ...

See also:

Inclusion-exclusion principle, Inclusion-exclusion principle - Counting intersections

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Let L1 and L2 be a pair of lines, both in a projective plane and expressed in homogeneous coordinates: L1:[m1:b1:1]L L2:[m2:b2:1]L where m1 and m2 are slopes and b1 and b2 are y-interce ...

See also:

Incidence geometry, Incidence geometry - Intersection of a pair of lines, Incidence geometry - Determining the line passing through a pair of points, Incidence geometry - Checking for incidence of a line on a point, Incidence geometry - Concurrence, Incidence geometry - Collinearity

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