- Get the maximum car places.

          -Very convenient parking, comfortable for drivers.

          -No need to go into the basement.

          -Use land most effectively.

          -Very intelligent controlled by program.

          -No ramp, simple structure, easy to design.

          -Safety for drivers and cars.

          -High speed of parking and retrieving time by
   comb exchange.

          -Reduce many facilities of conventional
   basement parking.

          -Reduce pollution.