Eswatini's road traffic law prohibits driving under the influence of alcohol and sets a prescribed maximum blood-alcohol concentration, and the Royal Eswatini Police Service runs roadside enforcement. Why is 'staying just under the limit' still a poor plan for a learner driver?

1. Because the prescribed limit applies only to motorcycle riders
2. Because impairment begins well below the legal threshold and no driver can reliably judge their own blood-alcohol level
3. Because the prescribed limit is suspended on public holidays
4. Because strong coffee clears alcohol from the blood within minutes