Segway PT i2 Getting Started Manual page 116

Until you can ride with this precision, do not attempt to ride in any
area where you might encounter children, pedestrians, pets,
vehicles, bicycles, or other obstacles and potential hazards.
Your first rides without the Beginner Setting should be in the
same secure areas where you learned to ride with the Beginner
Setting.
Use caution when riding in new environments.
Be careful when riding through a doorway.
98