headline: Take a ride around San Francisco in a driverless taxi
text: In San Francisco a futuristic pilot is taking place - fully driverless robo-taxis are being allowed at night for paying members of the public. 
  mpany Cruise, says the cars will revolutionise transport. 
  But critics say putting fully autonomous taxis on urban streets is premature and dangerous. James Clayton took a ride in one of the cars to see how it felt.