Details have been revealed as to how hackers were able to change audio messages at crosswalks in various cities on the Peninsula. In April, hackers managed to access the control system of some Caltrans-installed crosswalks in Palo Alto, Menlo Park and Redwood City. The usual crosswalk messages were replaced by AI voices of Elon Musk and Mark Zuckerberg. Robert Handa takes a closer look at how hackers were able to gain access to the system and change the audio message. Watch his report in the video above. Silicon Valley Apr 12 Hacked Silicon Valley crosswalk buttons play messages imitating Mark Zuckerberg, Elon Musk Technology Dec 12 Humanoid robots take center stage at Silicon Valley summit, but skepticism remains ...read more read less