An apparatus controls a vehicle having an engine including a throttle having a
throttle position sensor, the throttle being adjustable to vary the speed of the
vehicle, a transmission having an input shaft, an output shaft, and drive means
there between providing a variable drive ratio, and a transmission controller for
controlling the drive ratio between said input and output shafts, and at least
one axle in driving connection with the output shaft of the said transmission,
wherein the controller comprises a selector operable to select between first and
second modes of operation, in said first mode the throttle and transmission are
operated individually by the operator in said second mode, operation of the throttle
and transmission is interconnected and performed by means of a computer program.