Seattle's government has given early approval to caps on ride-share companies such as Uber. Here, Peter Faris, whose company's drivers use Uber to find customers, holds a smartphone with the ride-sharing company's app in Washington, D.C. Paul J. Richards/AFP/Getty Images hide caption

itoggle caption Paul J. Richards/AFP/Getty Images

Black taxis drive down The Mall in London. A Chinese company rescued the British automaker that manufactures the famous cabs. Pierre-Philippe Marcou/AFP/Getty Images hide caption

itoggle caption Pierre-Philippe Marcou/AFP/Getty Images