(FILES) In this file photo taken on March 27, 2017 an Uber self-driving car drives down 5th Street on March 28, 2017 in San Francisco, California.  The race to perfect robot cars continues despite fears kindled by the death of a woman hit by a self-driving Uber vehicle while pushing a bicycle across an Arizona street. Uber put a temporary halt to its self-driving car program in the US after the fatal accident this month near Phoenix, where several other companies including Google-owned Waymo are testing such technology.  / AFP PHOTO / Getty Images North America / JUSTIN SULLIVAN /  With AFP Story by Ian TIMBERLAKE:  US-lifestyle-internet-automobile-Uber,foucs
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