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Platform: the area that brings all the parts of the road together. Roadway: the part of the road intended for vehicles to travel on and that, depending on its size, may be made up of one or more lanes. Lane: a longitudinal strip that is part of the roadway.
The basic components of the highway are the road width, cross slope, pavement, road margins, traffic separators, and curbs. These geometric elements are designed and influenced by the psychology of the driver, the characteristics of the vehicle and the traffic of the region.
A shoulder, hard shoulder (British) [1] or breakdown lane is an emergency stopping lane by the verge on the outer side of a road or motorway. Many wider 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.
The edge of the road (as others have mentioned) is the shoulder. Beyond the shoulder is the verge. The whole strip of land the road follows is called a right-of-way in some places and a reserve in other places.
A curb ( North American English ), or kerb ( Commonwealth English except Canada; see spelling differences ), is the edge where a raised sidewalk or road median/central reservation meets a street or other roadway. History. Pedestrian area separated from carriageway by six bollards in front of the East India House in London, 1766.
In curved sections, the outside edge of the road is superelevated above the centerline. Since the road is sloped down toward the inside of the curve, gravity draws the vehicle toward the inside of the curve.
A road verge is a strip of groundcover consisting of grass or garden plants, and sometimes also shrubs and trees, located between a roadway and a sidewalk. Verges are known by dozens of other names such as grass strip, nature strip or curb strip, the usage of which is often quite regional.
