Myths about tornado 2

Overpasses are that safe as people think are when dealing with a torndo. In reality, when directly hit by tornadoes, the confined spaces beneath overpasses increase the speed of the winds due to the Venturi effect, and thus make them potentially less safe (http://en.wikipedia.org/wiki/Tornado_myths#Using_highway_overpasses_as_shelter). Andover tornado footage, it was discovered that the tornado did not pass directly over the bridge, but instead over the ground slightly south of the bridge and camera crew, exposing them to much weaker winds (http://en.wikipedia.org/wiki/Tornado_myths#Using_highway_overpasses_as_shelter). The overpass was also of a specific design which included a hollow crawlspace at the top of the embankment under the bridge surface (http://en.wikipedia.org/wiki/Tornado_myths#Using_highway_overpasses_as_shelter).