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Geometric design
Dar Al Khalij carries out highway design in accordance with the wide experience available with its technical teams in various fields of roads designing in rural and urban areas. Also, since Dar Al Khalij is specialized in roads engineering, this gives it a clear superiority in this field.
Dar Al Khalij in its studies depends on local and international manuals and standards in the field of roads designing such as the manuals of the Ministry Of Transport in the kingdom, AASHTO and FHWA in the United States.
Many integrated engineering programs are used which are capable of producing a comprehensive design that includes all the engineering elements of roads, intersection and related structures. Those programs are capable of utilizing field survey results and the results of traffic, hydrological and soil studies which form a basis for the design.
The approved design method programs of Dar Al Khalij fulfill the following:
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• Transfer survey data from the site to contour plans.
• Design horizontal alignment for the road and its related adjacent areas considering all the design elements that control that alignment such as sight distance, design speed and ownership of the road adjacent lands.
• Design of circular horizontal, complex and transitional curves and calculation of all their engineering elements.
• Design vertical alignment of the road compound, vertical curves connecting between alignments considering longitudinal slopes, sight distance and sites of fixed control points such as tunnels, bridges, culverts and access of adjacent structures to the road.
• Design the cross sections of the road considering side slope, right of way and all other engineering requirements.
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