Taxiing aircraft are best modelled using either AutoDrive or Follow. Script may also be appropriate if you want to create templates of well-defined simple manoeuvres.
Follow will be appropriate if you want to model an aircraft following existing apron markings. If you want pilots eye tracking then you will need to change the Forwards Path Point to Pilot / Driver (Refer to Drawing Settings: Tracking Point). This must be done before you start driving. If your vehicle fails to negotiate a turn then you could try lengthening the segment length (Refer to System Settings: Follow Drive). The further the pilot is offset from the effective front axle the greater this value may need to be.
AutoDrive may be more appropriate if you are trying to determine the position of the apron markings. You will probably use the Forwards Arc option in AutoDrive which tries to drive with the minimum turn arcs and only use Forwards Bearing for long straight sections.