Uber Technologies Inc [UBER.UL] put its self-driving cars back on the road on Monday, voicing confidence in its autonomous vehicle program three days after one of its cars was involved in a crash in Tempe, Arizona. Uber wrapped up a brief investigation and cleared its autonomous cars to resume driving in the three cities where it operates a self-driving pilot program - Tempe, San Francisco and Pittsburgh, Pennsylvania - an Uber spokeswoman, who declined to be named, told Reuters.