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This paper deals with a new pedestrian underpass made from structural deep corrugated plates over a newly constructed airport access road for Mumbai International Airport, India. The underpass was constructed to cater for the demands of local establishments for crossing the highway. The steel bridge is founded on raft footing made of reinforced concrete. Its effective span is 4.10 m and clear height is 2.29 m. The entire underpass was constructed in just 20 days. The structural design and construction of the underpass is described in detail in this paper.