and now in Japan's city of Yokohama there's Turtle Taxis offering at the push of a button, slower, more relaxing rides to your destination.
Pressing the button indicates to the compliant driver that you wish for a leisurely drive with less fast acceleration and no sudden braking.
The ecology minded are happy because each journey uses less fossil fuel and the new Turtle Taxis are said to be ideal for the elderly or pregnant passengers. Perhaps they drive so slowly it's possible to grow old on the way to the airport or have the time and the comfort to become pregnant...
