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Explanation: If you feel the onset of tiredness, you need to take a break. This might be at a motorway service station, but if there isn't one nearby you'll need to leave at the next exit and find a safe place to stop and rest.
Category: The Driver
References: The Official DVSA Guide to Driving Buses and Coaches: Section 3, The Official DVSA Guide to Driving Goods Vehicles: Section 3