The Jeddah-Makkah Expressway is designed to provide a high-speed high-capacity link between Saudi Arabia's major seaport and the Holy City of Makkah. The Expressway is elevated on dual three lane viaducts for the first 10.5km within the Jeddah urban area, descending to ground level for the remaining 60km across mainly desert terrain to the Holy City of Makkah. A standard single deck width of 17.45m was adopted for the viaduct with spans ranging from 36m to 40m. Span by span construction using precast segments facilitated the speed of erection and provided the quality control to ensure a high standard of finish throughout the entire length of the viaduct, one of the largest in the world.
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