LOS ANGELES, CA – JULY 16: Workers demolish the south side of Mulholland overpass on the 405 freeway during the 53-hour total freeway closure resulting in massive traffic disruptions expected throughout the region on July 16, 2011 in Los Angeles, California. The bridge is being demolished as part of a $1 billion project to add carpool lanes and make other improvements along the 405 freeway from Orange County to the city of San Fernando. (Photo by David McNew/Getty Images)