The truly safe blood alcohol level for driving is...
A)0.10 grams of alcohol per litre of blood.
B)0.15 grams of alcohol per litre of blood.
C)0.0 grams of alcohol per litre of blood.Correct
Below the permitted blood alcohol limit, an accident due to alcohol can still occur. The only truly safe level is 0.0 g/l of alcohol in the blood.
Alcohol produces the following effects on the driver:
- It alters their behaviour: they have a false sense of security, are less cautious, commit more violations, and display impulsive and aggressive responses towards others.
- It alters their perception of the traffic environment: they perceive things worse, misjudge distances and speed, are more sensitive to glare, and may experience the "tunnel vision" phenomenon.
- It alters their ability to pay attention (more distractions).
- It alters their psychomotor skills: their precision and coordination decrease.
The tunnel vision effect occurs when we lose peripheral vision and can only see the centre of the road clearly. This phenomenon occurs with alcohol and with speed.