==>>PRINCIPLES OF HIGHWAY LOCATION<<==

==>>LOCATION ==>>GEOMETRICS==>>DRAINAGE<<==

Highway location involves the acquisition of data concerning the terrain upon which the road will traverse and the economical siting of an alignment. To be considered are factors of earthwork, geologic conditions, and land use. Geometric design principles are used to establish the horizontal and vertical alignment,
including consideration of the driver, the vehicle, and roadway characteristics. Design of parking and terminal facilities must be considered as they form an integral part of the total system. Since the new highway will alter existing patterns of surface and subsurface flow—and be influenced by it—careful attention to the design of drainage facilities is required....

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PRINCIPLES OF HIGHWAY LOCATION


The basic principle for locating highways is that roadway elements such as curvature and grade must blend with each other to produce a system that provides for the easy flow of traffic at the design capacity, while meeting design criteria and safety standards. The highway should also cause a minimal disruption to historic and archeological sites and to other land-use activities. Environmental impact studies are therefore required in most cases before a highway location is finally agreed upon.

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The highway location process involves four phases:

==>> Office study of existing information
==>> Reconnaissance survey
==>> Preliminary location survey
==>>Final location survey