UK Driving Theory Practice Exam 2025 - Free Driving Theory Practice Questions and Study Guide

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What is the minimum time a driver must wait after drinking before driving?

One hour for each unit of alcohol consumed

The recommended guideline for waiting time after consuming alcohol before driving is based on the understanding that the body metabolizes alcohol at a steady rate. The suggestion of waiting one hour for each unit of alcohol consumed is founded on the average time it takes for the body to process and eliminate alcohol. This approach helps ensure that the driver is not over the legal blood alcohol concentration limit, which can impair judgment and reaction times.

The idea behind this guideline is that alcohol affects everyone differently, and while some individuals may feel they are fit to drive after a short period, it does not guarantee they are below the legal limit. Therefore, adhering to the guideline of one hour per unit consumed is a more reliable method to achieve safety on the road.

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No minimum time, if you feel fine

Two hours regardless of consumption

It depends on the driver's age

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