**Speed competitions** on public roads are **prohibited**, unless they are **authorized by the competent authorities**. This means they can only be held on **designated roads** specifically for this purpose and with the necessary safety measures. Participating in unauthorized races can result in the loss of points on the driving license.

The main reason for this restriction is that driving at high speed increases the risk of accidents, as it is more difficult to react to unforeseen events and the ability to see what is happening on the sides is reduced, a phenomenon known as **tunnel vision**. Additionally, excessive speed can cause **fatigue and aggressiveness** in the driver, further increasing the danger on the road.

Therefore, the only situation in which speed competitions are allowed is when they are conducted in controlled conditions and with the proper authorization.