Types of highway intersections | At grade intersection | Grade separated intersection
Highway intersections When two or more roads intersect or cross, road users must adjust their movement to prevent a 'collision;' this adjustment could be in the form of a speed reduction or a change in the path of their motion. "The broad region where two or more roadways join or cross, within which are included the carriageway and roadside design characteristics that support orderly traffic flows in that area," according to the definition of an intersection. "That segment of any one of the roadways radiating from an intersection that is outside of the region of the intersection proper," says an intersection leg. The driver of an approaching vehicle must execute particular traffic manoeuvres in the intersection area depending on the direction or intersection leg in which he or she wishes to move. The area shared by the joining or crossing of two or more roadways is known as a junction. Because the primary purpose of a crossroads is to allow a road ...