A "NO STOPPING" signs means:

• You can stop only to obey a traffic sign, signal, or officer, or to prevent conflicts with other vehicles.
  Explanation:

  "A NO STOPPING sign means you can stop only to obey a traffic sign, signal or officer, or to prevent conflicts with other vehicles."
• You can stop briefly to pick up or drop off passengers, but cannot leave the vehicle.
• You can stop only to load and unload passengers or wait for them to arrive.
• None of the above.