One beer and a tired ride home
You are 19, riding on a learner licence with an L plate. You finish a 12-hour shift at 10 pm and have one 330 ml standard beer at a work farewell. You feel tired but not drunk. Your motorcycle is 25 km away, mostly on unlit rural roads with a 100 km/h limit. The last bus left at 9:30 pm and a taxi would cost $70. It is 11:15 pm, raining, and you have an early start tomorrow. You have had no food since lunch. A workmate says one beer is fine because you are big and it has been an hour. Your eyes feel gritty and you have already yawned several times. The road has no streetlights and two narrow bridges.
1. What is your legal alcohol limit, and does the one beer satisfy it?
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As a rider under 20, your legal alcohol limit is zero. Even one standard beer can leave alcohol in your system; the body clears roughly one standard drink per hour, but this varies with food, body size, medication and liver function. Being big does not make you zero. If you ride and are stopped, you can be charged even if you feel sober. The safe and legal choice is not to ride.
2. Assess the fatigue risk and what you should do.
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The 12-hour shift, yawning, gritty eyes, no food, rain and an unlit rural road all point to high fatigue risk. Fatigue slows reaction time and causes microsleeps, and it is not fixed by coffee or cold air. A 25 km night ride on rural roads is exactly where a microsleep is dangerous. You should not ride. Call a taxi, ask a friend, or stay over; the cost is less than a crash.
3. What would you say to the workmate, and what is the safest plan?
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Explain that your limit is zero and that you are too tired to ride safely. Leave the bike locked and take a taxi or get a lift. Do not ride just because the trip is short or the taxi is expensive. If you cannot get a lift, wait somewhere safe, but do not treat waiting as making you fit to ride if you are still fatigued.