The battery pack will last 15,000-25,000 miles or four years before replacement. The two electric motors will last many years. The inexpensive brushes will need to be replaced after about 5,000 hours of use. The inexpensive bearings will need to be replaced after about 10,000 hours of run time.
Anyone that is unsafe or rude to others will be asked to disembark the train and will no longer get train rides.
Check
your local ordinances if you are using a park or public area. Hills are unacceptable, trackless trains require fairly flat terrain on
a hard surface, Grass is fine and slight inclines are OK too.