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LONDON, ENGLAND - DECEMBER 22: An Uber driver poses for a photograph in an Uber t-shirt and holding a smart phone displaying the Uber app after delivering petitions to the Transport for London headquarters on December 22, 2015 in London, England. The Uber drivers formally handed in the petition, signed by over 205,000 people, to oppose proposals such as introducing minimum 5 minute waiting times. (Photo by Carl Court/Getty Images)

LONDON, ENGLAND - DECEMBER 22:  An Uber driver poses for a photograph in an Uber t-shirt and holding a smart phone displaying the Uber app after delivering petitions to the Transport for London headquarters on December 22, 2015 in London, England. The Uber drivers formally handed in the petition, signed by over 205,000 people, to oppose proposals such as introducing minimum 5 minute waiting times.  (Photo by Carl Court/Getty Images)

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A sign advertising for drivers outside of Uber's Queens offices in New York on Monday, February 1, 2016. Uber drivers are upset over Uber's recent 15% cut in fares meaning less money for the drivers so they have gone on strike. Uber claims that the cut will increase volume and the drivers will have less down-time. (�� Richard B. Levine) (Photo by Richard Levine/Corbis via Getty Images)

A sign advertising for drivers outside of Uber's Queens offices in New York on Monday, February 1, 2016. Uber drivers are upset over Uber's recent 15% cut in fares meaning less money for the drivers so they have gone on strike. Uber claims that the cut will increase volume and the drivers will have less down-time. (�� Richard B. Levine) (Photo by Richard Levine/Corbis via Getty Images)

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A Taxi.eu cab hire smart phone app advertisement and the PayPal online payment system logo sit on the side of a taxi operated by Leipold Taxibetrieb, in Berlin, Germany, on Wednesday, Feb. 4, 2015. In Berlin, where taxis generate revenue of about 450 million euros ($514 million) a year, Richard Leipold, owner of Leipold Taxibetrieb, has spearheaded the opposition to Uber Technologies Inc., the ride-sharing service. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

A Taxi.eu cab hire smart phone app advertisement and the PayPal online payment system logo sit on the side of a taxi operated by Leipold Taxibetrieb, in Berlin, Germany, on Wednesday, Feb. 4, 2015. In Berlin, where taxis generate revenue of about 450 million euros ($514 million) a year, Richard Leipold, owner of Leipold Taxibetrieb, has spearheaded the opposition to Uber Technologies Inc., the ride-sharing service. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

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An abri at a bus stop in the old center of Dubrovnik is seen advertising UberBOAT a service using the popular Uber app which allows persons to share a boat ride to go island hopping off the coast of Croatia. (Photo by Jaap Arriens/NurPhoto via Getty Images)

An abri at a bus stop in the old center of Dubrovnik is seen advertising UberBOAT a service using the popular Uber app which allows persons to share a boat ride to go island hopping off the coast of Croatia. (Photo by Jaap Arriens/NurPhoto via Getty Images)

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People wait for a bus at the bus stop branded with Uber Taxi service ad at Khreshchatyk str. in Kyiv, Ukraine, October 10, 2017. (Photo by Sergii Kharchenko/NurPhoto via Getty Images)

People wait for a bus at the bus stop branded with Uber Taxi service ad at Khreshchatyk str. in Kyiv, Ukraine, October 10, 2017. (Photo by Sergii Kharchenko/NurPhoto via Getty Images)