ABC7 was at South Bascom Avenue and Renova Drive Wednesday afternoon where a tech operator was busy replacing them.
The new devices give people the option of waving their hand to trigger the walk signal instead of pressing a button.
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This means fewer germs are spread through touch.
Santa Clara County chose 25 of the busiest expressway intersections to have them installed.
VIDEO: Cleanliness may provide 'false hope' when combating COVID-19, doctor says
Cleanliness may provide 'false hope' when combating COVID-19
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