Platform lifts can either be hold-to-run or travel automatically.

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Some differences between lifting platforms and
conventional passenger lifts.

• Platform lifts can either be hold-to-run or
  travel automatically.
• Travel speed is limited to 0,15 m/s.
• Not suitable to use in buildings with
  heavy passenger traffic.
• Less rated load weight when compared to
  conventional passenger lifts.
• Lifting platforms can have an open carriage or a
  fully enclosed platform carrier. whilst
  conventional passenger lifts must have a fully
  enclosed car.