Tunnel Overpass

Several meteorologists have advocated that overpasses are insufficient shelter from tornado winds and debris, and may be among the worst places to take refuge during a violent tornado. The embankment under an overpass is higher than the surrounding terrain, and the wind speed increases with height. Additionally, the overpass design may create a effect under the span, further increasing the wind speed. Many overpasses are completely exposed underneath and most lack hanging girders or. [pdf]