We do not allow the installation and use of knob on steering wheel as drivers may tend to over-rely on the steering knob when negotiating a turn or manoeuvring the vehicle. This could result in losing control of the vehicle in an emergency occurrence and affecting the safety of the vehicle occupant and other road user. In additional, the knob may also cause severe injury to the driver in the event of an accident when the collision forced the driver against the knob or vice-versa. On the contrary, we would urge drivers to use hand controls when manoeuvring with the steering wheel for better control of their vehicles

Source:LTA