limitation

1. Choice of line is made in the hardware
2. Abstraction cannot be changed by software
3. Calibration is difficult and it is not easy to set a perfect value
4. The steering mechanism is not easily implemented in huge vehicles and impossible for non-electric vehicles
5. Few curves are not made efficiently and must be avoided
6. Hard to debug a faulty sensor
7. Lack of speed control makes the robot unstable at times