Security measures were eased Aug. 12 on the Golden Gate Bridge, after a weekend "super-heightened" alert, which allegedly stemmed from a terrorist threat to crash a plane into the span, AP reported.

Security was downgraded to the "heightened" state of alert, in effect since the Sept. 11 attacks, said Mary Currie, spokeswoman for the Golden Gate Bridge Highway & Transportation District. During the weekend, National Guardsmen patrolled below the bridge and federal officials watched the skies.

Traffic for Monday morning's commute appeared normal. The bridge was placed on a "super-heightened" state of alert Friday through Sunday after information was shared through an interagency coalition Friday, Currie said.