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Toll collector Marilyn Alvardo (R) speaks to members of the media from her tollbooth after receiving the last toll at the Golden Gate Bridge toll plaza in San Francisco, California March 27, 2013. The Golden Gate Bridge will convert from manned tollbooths to a full electronic tolling system starting today. With the automated system in place, motorists will have the option of using the existing FasTrak electronic toll collection system or the newly implemented pay-by-plate option, according to the Golden Gate Bridge management. REUTERS/Stephen Lam ( USA/ )

Toll collector Marilyn Alvardo (R) receives the last toll from Jim Eddie, who is driving a vintage 1937 Packard, at her tollbooth at the Golden Gate Bridge toll plaza in San Francisco, California March 27, 2013. The Golden Gate Bridge will convert from manned tollbooths to a full electronic tolling system starting March 27. With the automated system in place, motorists will have the option of using the existing FasTrak electronic toll collection system or the newly implemented pay-by-plate option, according to Golden Gate Bridge management. REUTERS/Stephen Lam ( USA/ )

Toll collector Marilyn Alvardo (C) carries the toll she collected for the last time at the Golden Gate Bridge toll plaza in San Francisco, California March 27, 2013. The Golden Gate Bridge will convert from manned tollbooths to a full electronic tolling system starting today. With the automated system in place, motorists will have the option of using the existing FasTrak electronic toll collection system or the newly implemented pay-by-plate option, according to the Golden Gate Bridge management. REUTERS/Stephen Lam ( USA/ )

Toll collector Marilyn Alvardo (C) speaks to members of the media from her tollbooth after receiving the last toll at the Golden Gate Bridge toll plaza in San Francisco, California March 27, 2013. The Golden Gate Bridge will convert from manned tollbooths to a full electronic tolling system starting today. With the automated system in place, motorists will have the option of using the existing FasTrak electronic toll collection system or the newly implemented pay-by-plate option, according to the Golden Gate Bridge management. REUTERS/Stephen Lam ( USA/ )

Two bridge workers cover a display at the Golden Gate Bridge toll plaza in preparation of the tolling system conversion in San Francisco, California March 27, 2013. The Golden Gate Bridge will convert from manned tollbooths to a full electronic tolling system starting today. With the automated system in place, motorists will have the option of using the existing FasTrak electronic toll collection system or the newly implemented pay-by-plate option, according to the Golden Gate Bridge management. REUTERS/Stephen Lam ( USA/ )

Toll collector Marilyn Alvardo (C) leaves her tollbooth, as the last human toll collector, at the Golden Gate Bridge toll plaza in San Francisco, California March 27, 2013. The Golden Gate Bridge will convert from manned tollbooths to a full electronic tolling system starting today. With the automated system in place, motorists will have the option of using the existing FasTrak electronic toll collection system or the newly implemented pay-by-plate option, according to the Golden Gate Bridge management. REUTERS/Stephen Lam ( USA/ )

A worker paints the window of a tollbooth at the Golden Gate Bridge toll plaza in San Francisco, California March 27, 2013. The Golden Gate Bridge will convert from manned tollbooths to a full electronic tolling system starting today. With the automated system in place, motorists will have the option of using the existing FasTrak electronic toll collection system or the newly implemented pay-by-plate option, according to the Golden Gate Bridge management. REUTERS/Stephen Lam ( USA/ )

Toll collector Marilyn Alvardo (C) waves as she leaves her tollbooth, as the last human toll collector, at the Golden Gate Bridge toll plaza in San Francisco, California March 27, 2013. The Golden Gate Bridge will convert from manned tollbooths to a full electronic tolling system starting today. With the automated system in place, motorists will have the option of using the existing FasTrak electronic toll collection system or the newly implemented pay-by-plate option, according to the Golden Gate Bridge management. REUTERS/Stephen Lam ( USA/ )

An empty toll booth is seen at the Golden Gate Bridge toll plaza in San Francisco, California March 27, 2013. The Golden Gate Bridge will convert from manned tollbooths to a full electronic tolling system starting today. With the automated system in place, motorists will have the option of using the existing FasTrak electronic toll collection system or the newly implemented pay-by-plate option, according to the Golden Gate Bridge management. REUTERS/Stephen Lam ( USA/ )