// Use this for initialization
void Start()
{
Vector3 vehiclePositon = transform.position + Vector3.up * heightOffset + Vector3.right * startOffset;
GameObject vehicleObject = Instantiate(vehiclePrefabs[0], vehiclePositon, transform.rotation) as GameObject;
VehicleBehaviour vehicleScript = vehicleObject.GetComponent <VehicleBehaviour> ();
vehicleScript.setSpeed(vehicleSpeed, vehicleLifeLength);
}