The Fly-Over: It Unclogs Urban Traffic in A Hurry

by William W. Pleasants, (M.ASCE), Engrg. Consultant; Bethel, Del.,

Serial Information: Civil Engineering—ASCE, 1980, Vol. 50, Issue 5, Pg. 71-75

Document Type: Feature article

Errata: (See full record)


Fly-overs are light-weight, low-cost, prefabricated steel structures that elevate only one or two lanes over a traffic-choked city intersection but dramatically reduce congestion. By removing 2000 cars per hour from the intersection, fly-overs can make a considerable contribution to reducing gasoline consumption by eliminating stop-and-go driving. The author reports on the excellent progress made in this technology by French, British, and German firms, describes different applications of fly-overs, and presents his recommendations for transfer of this technology to the United States. Other examples of their application in Belgium and Venezuela are detailed, and a typical construction sequence is described.

Subject Headings: Urban areas | Traffic management | Steel structures | Traffic congestion | Intersections | Benefit cost ratios | Prefabrication | Traffic signals | United States | Belgium | Europe | Venezuela | South America

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