Golden Gate Bridge stated that uncontrolled pedestrian access was not being considered as part of the 75th anniversary on Sunday, May 27, 2012, because of the additional law enforcement costs required "since 9/11". Until 1964, the Golden Gate Bridge had the longest suspension bridge main span in the world, at . Since 1964 its main span length has been surpassed by thirteen bridges; it now has the second-longest main span in the United States, after the Verrazzano-Narrows Bridge in New York City. The total length of the Golden Gate Bridge from abutment to abutment is . The Golden Gate Bridge's clearance above high
Golden Gate Bridge million. Since its completion, the Golden Gate Bridge has been closed because of weather conditions only three times: on December 1, 1951, because of gusts of ; on December 23, 1982, because of winds of ; and on December 3, 1983, because of wind gusts of . An anemometer, placed midway between the two towers on the west side of the bridge, has been used to measure wind speeds. Another anemometer was placed on one of the towers. Modern knowledge of the effect of earthquakes on structures led to a program to retrofit the Golden Gate to better resist seismic